mc1322x: build fixes for uart2
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e2d74fa0a5
commit
e80f9eb4b5
8 changed files with 124 additions and 51 deletions
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@ -177,9 +177,18 @@ extern volatile uint32_t u1_rx_head, u1_rx_tail;
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#endif
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uint8_t uart1_getc(void);
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extern volatile uint32_t u2_head, u2_tail;
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#define UART2_TX_BUFFERSIZE 1024
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extern volatile uint32_t u2_tx_head, u2_tx_tail;
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void uart2_putc(char c);
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#define UART2_RX_BUFFERSIZE 128
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#if UART2_RX_BUFFERSIZE > 32
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extern volatile uint32_t u2_rx_head, u2_rx_tail;
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#define uart2_can_get() ((u2_rx_head!=u2_rx_tail) || (*UART2_URXCON > 0))
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#else
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#define uart2_can_get() (*UART2_URXCON > 0)
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#endif
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uint8_t uart2_getc(void);
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#endif
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@ -48,7 +48,7 @@ void uart1_isr(void) {
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#if UART1_RX_BUFFERSIZE > 32
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if (*UART1_USTAT & ( 1 << 6)) { //receive interrupt
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while( *UART1_URXCON != 0 ) { //flush the hardware fifo into the software buffer
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while( *UART1_URXCON != 0 ) { //flush the hardware fifo into the software buffer
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uint32_t u1_rx_tail_next;
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u1_rx_tail_next = u1_rx_tail+1;
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if (u1_rx_tail_next >= sizeof(u1_rx_buf))
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@ -62,7 +62,7 @@ void uart1_isr(void) {
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}
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#endif
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while( *UART1_UTXCON != 0 ) {
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while( *UART1_UTXCON != 0 ) {
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if (u1_tx_head == u1_tx_tail) {
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#if UART1_RX_BUFFERSIZE > 32
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*UART1_UCON |= (1 << 13); /*disable tx interrupt */
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@ -36,43 +36,91 @@
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#include <mc1322x.h>
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#include <stdint.h>
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volatile char u2_tx_buf[64];
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volatile uint32_t u2_head, u2_tail;
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volatile char u2_tx_buf[UART2_TX_BUFFERSIZE];
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volatile uint32_t u2_tx_head, u2_tx_tail;
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#if UART2_RX_BUFFERSIZE > 32
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volatile char u2_rx_buf[UART2_RX_BUFFERSIZE-32];
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volatile uint32_t u2_rx_head, u2_rx_tail;
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#endif
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void uart2_isr(void) {
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while( *UART1_UTXCON != 0 ) {
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if (u2_head == u2_tail) {
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#if UART2_RX_BUFFERSIZE > 32
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if (*UART2_USTAT & ( 1 << 6)) { //receive interrupt
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while( *UART2_URXCON != 0 ) { //flush the hardware fifo into the software buffer
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uint32_t u2_rx_tail_next;
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u2_rx_tail_next = u2_rx_tail+1;
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if (u2_rx_tail_next >= sizeof(u2_rx_buf))
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u2_rx_tail_next = 0;
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if (u2_rx_head != u2_rx_tail_next) {
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u2_rx_buf[u2_rx_tail]= *UART2_UDATA;
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u2_rx_tail = u2_rx_tail_next;
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}
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}
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return;
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}
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#endif
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while( *UART2_UTXCON != 0 ) {
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if (u2_tx_head == u2_tx_tail) {
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#if UART2_RX_BUFFERSIZE > 32
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*UART2_UCON |= (1 << 13); /*disable tx interrupt */
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#else
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disable_irq(UART2);
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#endif
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return;
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}
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*UART2_UDATA = u2_tx_buf[u2_tail];
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u2_tail++;
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if (u2_tail >= sizeof(u2_tx_buf))
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u2_tail = 0;
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*UART2_UDATA = u2_tx_buf[u2_tx_tail];
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u2_tx_tail++;
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if (u2_tx_tail >= sizeof(u2_tx_buf))
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u2_tx_tail = 0;
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}
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}
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void uart2_putc(char c) {
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/* disable UART2 since */
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/* UART2 isr modifies u2_head and u2_tail */
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disable_irq(UART2);
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/* UART2 isr modifies u2_tx_head and u2_tx_tail */
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#if UART2_RX_BUFFERSIZE > 32
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*UART2_UCON |= (1 << 13); /*disable tx interrupt */
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#else
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disable_irq(UART2);
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#endif
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if( (u2_head == u2_tail) &&
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if( (u2_tx_head == u2_tx_tail) &&
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(*UART2_UTXCON != 0)) {
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*UART2_UDATA = c;
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} else {
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u2_tx_buf[u2_head] = c;
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u2_head += 1;
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if (u2_head >= sizeof(u2_tx_buf))
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u2_head = 0;
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if (u2_head == u2_tail) { /* drop chars when no room */
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if (u2_head) { u2_head -=1; } else { u2_head = sizeof(u2_tx_buf); }
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u2_tx_buf[u2_tx_head] = c;
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u2_tx_head += 1;
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if (u2_tx_head >= sizeof(u2_tx_buf))
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u2_tx_head = 0;
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if (u2_tx_head == u2_tx_tail) { /* drop chars when no room */
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if (u2_tx_head) { u2_tx_head -=1; } else { u2_tx_head = sizeof(u2_tx_buf); }
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}
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enable_irq(UART1);
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#if UART2_RX_BUFFERSIZE > 32
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*UART2_UCON &= ~(1 << 13); /*enable tx interrupt */
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#else
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enable_irq(UART2);
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#endif
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}
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}
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uint8_t uart2_getc(void) {
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#if UART2_RX_BUFFERSIZE > 32
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/* First pull from the ram buffer */
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uint8_t c=0;
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if (u2_rx_head != u2_rx_tail) {
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c = u2_rx_buf[u2_rx_head++];
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if (u2_rx_head >= sizeof(u2_rx_buf))
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u2_rx_head=0;
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return c;
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}
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#endif
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/* Then pull from the hardware fifo */
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while(uart2_can_get() == 0) { continue; }
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return *UART2_UDATA;
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}
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@ -94,31 +94,47 @@ void uart1_init(volatile uint16_t inc, volatile uint16_t mod, volatile uint8_t s
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void uart2_init(volatile uint16_t inc, volatile uint16_t mod, volatile uint8_t samp) {
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/* UART must be disabled to set the baudrate */
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/* UART must be disabled to set the baudrate */
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UART2->CON = 0;
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UART2->BR = ( inc << 16 ) | mod;
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/* TX and CTS as outputs */
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GPIO->PAD_DIR_SET.GPIO_14 = 1;
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GPIO->PAD_DIR_SET.GPIO_16 = 1;
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/* RX and RTS as inputs */
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GPIO->PAD_DIR_RESET.GPIO_15 = 1;
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GPIO->PAD_DIR_RESET.GPIO_17 = 1;
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/* see Section 11.5.1.2 Alternate Modes */
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/* you must enable the peripheral first BEFORE setting the function in GPIO_FUNC_SEL */
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/* From the datasheet: "The peripheral function will control operation of the pad IF */
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/* THE PERIPHERAL IS ENABLED. Can override with U2_ENABLE_DEFAULT. */
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UART2->CON = (1 << 0) | (1 << 1); /* enable receive, transmit */
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/* THE PERIPHERAL IS ENABLED. */
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#if UART2_RX_BUFFERSIZE > 32
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*UART2_UCON = (1 << 0) | (1 << 1) ; /* enable receive, transmit, and both interrupts */
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*UART2_URXCON = 30; /* interrupt when fifo is nearly full */
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u2_rx_head = 0; u2_rx_tail = 0;
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#elif UART2_RX_BUFFERSIZE < 32 /* enable receive, transmit, flow control, disable rx interrupt */
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*UART2_UCON = (1 << 0) | (1 << 1) | (1 << 12) | (1 << 14);
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*UART2_UCTS = UART2_RX_BUFFERSIZE; /* drop cts when tx buffer at trigger level */
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*GPIO_FUNC_SEL1 = ( (0x01 << (0*2)) | (0x01 << (1*2)) ); /* set GPIO17-16 to UART2 CTS and RTS */
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#else
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*UART2_UCON = (1 << 0) | (1 << 1) | (1 << 14); /* enable receive, transmit, disable rx interrupt */
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#endif
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if(samp == UCON_SAMP_16X)
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set_bit(*UART2_UCON, samp);
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set_bit(*UART2_UCON,UCON_SAMP);
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/* set GPIO18-19 to UART (UART2 TX and RX)*/
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GPIO->FUNC_SEL.GPIO_18 = 1;
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GPIO->FUNC_SEL.GPIO_19 = 1;
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/* set GPIO15-14 to UART (UART2 TX and RX)*/
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GPIO->FUNC_SEL.GPIO_14 = 1;
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GPIO->FUNC_SEL.GPIO_15 = 1;
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/* interrupt when there are this number or more bytes free in the TX buffer*/
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UART2->TXCON = 16;
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UART2->RXCON = 16;
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*UART2_UTXCON = 16;
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u2_tx_head = 0; u2_tx_tail = 0;
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u2_head = 0; u2_tail = 0;
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/* tx and rx interrupts are enabled in the UART by default */
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/* see status register bits 13 and 14 */
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/* enable UART2 interrupts in the interrupt controller */
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enable_irq(UART2);
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}
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@ -67,10 +67,10 @@
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#define CLIF
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/* Baud rate */
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#define MOD 9999
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#define BRMOD 9999
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/* 230400 bps, INC=767, MOD=9999, 24Mhz 16x samp */
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/* 115200 bps, INC=767, MOD=9999, 24Mhz 8x samp */
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#define INC 767
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#define BRINC 767
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/* 921600 bps, MOD=9999, 24Mhz 16x samp */
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//#define INC 3071
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#define SAMP UCON_SAMP_8X
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@ -196,7 +196,7 @@ init_lowlevel(void)
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trim_xtal();
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/* uart init */
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uart_init(INC, MOD, SAMP);
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uart_init(BRINC, BRMOD, SAMP);
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default_vreg_init();
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@ -67,12 +67,12 @@
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#define CLIF
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/* Baud rate */
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#define MOD 9999
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#define BRMOD 9999
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/* 230400 bps, INC=767, MOD=9999, 24Mhz 16x samp */
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/* 115200 bps, INC=767, MOD=9999, 24Mhz 8x samp */
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#define INC 767
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#define BRINC 767
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/* 921600 bps, MOD=9999, 24Mhz 16x samp */
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//#define INC 3071
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//#define BRINC 3071
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#define SAMP UCON_SAMP_8X
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//#define SAMP UCON_SAMP_16X
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@ -48,7 +48,7 @@
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#include "lib/random.h"
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#include "net/netstack.h"
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#include "net/mac/frame802154.h"
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#include "lib/include/uart1.h"
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#include "lib/include/mc1322x.h"
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#if WITH_UIP6
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#include "net/sicslowpan.h"
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@ -181,7 +181,7 @@ init_lowlevel(void)
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trim_xtal();
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/* uart init */
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uart_init(INC, MOD, SAMP);
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uart_init(BRINC, BRMOD, SAMP);
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default_vreg_init();
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