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81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
1 year ago
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#include "p_i2c.h"
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#include "p_usart.h"
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#include "hal_init.h"
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#include "pc_board.h"
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struct i2c_m_sync_desc p_i2c_master;
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void p_i2c_init(void)
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{
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// clock init
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hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_CORE, CONF_GCLK_SERCOM3_CORE_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
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hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_SLOW, CONF_GCLK_SERCOM3_SLOW_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
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hri_mclk_set_APBBMASK_SERCOM3_bit(MCLK);
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i2c_m_sync_init(&p_i2c_master, SERCOM3);
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// port init
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gpio_set_pin_pull_mode(I2C_MASTER_SDA,
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// <y> Pull configuration
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// <id> pad_pull_config
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// <GPIO_PULL_OFF"> Off
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// <GPIO_PULL_UP"> Pull-up
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// <GPIO_PULL_DOWN"> Pull-down
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GPIO_PULL_OFF);
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gpio_set_pin_function(I2C_MASTER_SDA, I2C_MASTER_SDA_MUX);
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gpio_set_pin_pull_mode(I2C_MASTER_SCL,
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// <y> Pull configuration
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// <id> pad_pull_config
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// <GPIO_PULL_OFF"> Off
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// <GPIO_PULL_UP"> Pull-up
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// <GPIO_PULL_DOWN"> Pull-down
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GPIO_PULL_OFF);
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gpio_set_pin_function(I2C_MASTER_SCL, I2C_MASTER_SCL_MUX);
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i2c_m_sync_enable(&p_i2c_master);
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}
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int p_i2c_write(const uint8_t* const data, uint16_t data_len)
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{
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return io_write(&p_i2c_master.io, data, data_len);
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}
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int p_i2c_read(uint8_t* data, uint16_t len)
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{
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return io_read(&p_i2c_master.io, data, len);
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}
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void p_i2c_detect(void)
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{
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PDEBUG(" ");
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for(int ind = 0; ind < 16; ind++)
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{
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PDEBUG(" %02x", ind);
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}
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uint8_t data = 0x00;
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for(int ind = 0; ind <= 119; ind++)
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{
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if (ind % 16 == 0)
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{
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PDEBUG("\r\n%02x:", ind & 0xF0);
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}
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i2c_m_sync_set_slaveaddr(&p_i2c_master, ind, I2C_M_SEVEN);
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int ret = p_i2c_write(&data, 1);
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if(ret != 1)
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{
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PDEBUG(" --");
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}
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else
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{
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PDEBUG(" %02x", ind);
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}
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}
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PDEBUG("\r\n");
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}
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