73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
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#include <stdint.h>
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#include "../../bsp/include/uart.h"
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#include "../../bsp/include/i2c.h"
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#include "../../bsp/include/xprintf.h"
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#include "../../bsp/include/utils.h"
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#include "../../bsp/include/rvic.h"
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#define SLAVE_ADDR (0xA0)
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static volatile uint8_t i2c_done;
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static void i2c_master_write(uint8_t addr, uint8_t data)
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{
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i2c_done = 0;
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i2c0_master_set_write(1);
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i2c0_master_set_info(SLAVE_ADDR, addr, data);
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i2c0_start();
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while (!i2c_done);
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}
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static uint8_t i2c_master_read(uint8_t addr)
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{
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i2c_done = 0;
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i2c0_master_set_write(0);
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i2c0_master_set_info(SLAVE_ADDR, addr, 0);
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i2c0_start();
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while (!i2c_done);
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return (i2c0_master_get_data());
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}
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int main()
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{
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uint8_t data, i;
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uart0_init(uart0_putc);
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i2c0_set_clk(0x7D); // 200KHZ
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i2c0_set_mode(I2C_MODE_MASTER);
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i2c0_set_interrupt_enable(1);
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rvic_set_irq_prio_level(RVIC_INT_ID_4, 1);
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rvic_irq_enable(RVIC_INT_ID_4);
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global_irq_enable();
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// 写
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for (i = 0; i < 10; i++) {
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i2c_master_write(i, i);
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xprintf("write[%d] = 0x%x\n", i, i);
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busy_wait(100 * 1000);
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}
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// 读
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for (i = 0; i < 10; i++) {
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data = i2c_master_read(i);
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xprintf("read[%d] = 0x%x\n", i, data);
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}
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while (1);
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}
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void i2c0_irq_handler()
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{
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i2c_done = 1;
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i2c0_clear_irq_pending();
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rvic_clear_irq_pending(RVIC_INT_ID_4);
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}
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