35 lines
931 B
C
35 lines
931 B
C
#include <mc1322x.h>
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#include <board.h>
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#include <uart1.h>
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/* INC = 767; MOD = 9999 works: 115200 @ 24 MHz 16 bit sample */
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#define INC 767
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#define MOD 9999
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void main(void) {
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/* mask interrupts, 16 bit sample --- helps explain the baud rate */
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*UART1_CON = 0x0000c800;
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*UART1_BR = INC<<16 | MOD;
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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. */
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*UART1_CON = 0x00000003; /* enable receive and transmit */
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*GPIO_FUNC_SEL0 = ( (0x01 << (14*2)) | (0x01 << (15*2)) ); /* set GPIO15-14 to UART (UART1 TX and RX)*/
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uint8_t c;
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while(1) {
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if(*UART1_CON > 0) {
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/* Receive buffer isn't empty */
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/* read a byte and write it to the transmit buffer */
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c = *UART1_DATA;
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*UART1_DATA = c;
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}
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}
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}
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