58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include "printf.h"
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#include "stx7105.h"
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#include "stx7105_utils.h"
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#define LED_RED_GPIO PIO0
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#define LED_RED_PIN 5U
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#define LED_BLUE_GPIO PIO0
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#define LED_BLUE_PIN 4U
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#define CONSOLE_ASC ASC2
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#define SYSTEM_DEVID (0xFE001000U) /* DEVID */
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#define SYSTEM_CONFIG34 (0xFE001188U) /* PIO4 */
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#define SYSTEM_CONFIG7 (0xFE00111CU) /* RXSEL */
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void uart_init(void) {
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PIO4->CLR_PC0 = 1U; /* PC = 110, AFOUT, PP */
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PIO4->SET_PC1 = 1U;
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PIO4->SET_PC2 = 1U;
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*(uint32_t *)SYSTEM_CONFIG34 = 0x00000100UL; /* BIT[8,0] = 10, AF 3 */
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*(uint32_t *)SYSTEM_CONFIG7 &= ~(0x00000006UL); /* BIT[2:1], UART2 RX SEL */
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CONSOLE_ASC->CTRL = 0x1509UL; /* 8N1, RX enable, FIFO enable, Baud mode 1 */
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CONSOLE_ASC->BAUDRATE = 0x04B8UL; /* 115200 in baud mode 1, assuming Fcomm=100MHz */
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CONSOLE_ASC->TX_RST = 0x01UL; /* Reset TX FIFO, any value OK */
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CONSOLE_ASC->RX_RST = 0x01UL; /* Reset RX FIFO, any value OK */
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CONSOLE_ASC->CTRL = 0x1589UL; /* 8N1, RX enable, FIFO enable, Baud mode 1 */
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}
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int main(void) {
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init_led(LED_RED_GPIO, LED_RED_PIN, 0U);
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init_led(LED_BLUE_GPIO, LED_BLUE_PIN, 0U);
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uart_init();
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printf("Hello world\r\n");
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for (;;) {
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set_led(LED_BLUE_GPIO, LED_BLUE_PIN, 1U);
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delay_ms(500);
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printf("Hello ?\r\n");
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set_led(LED_BLUE_GPIO, LED_BLUE_PIN, 0U);
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delay_ms(500);
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}
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return 0;
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}
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void _putchar(char ch) {
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while(CONSOLE_ASC->STA & 1 << 9U) {
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// wait for TX FIFO slot.
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}
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CONSOLE_ASC->TX_BUF = ch;
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} |