forked from liyanboy74/soft-i2c
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
3 changed files
with
153 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
|
|
||
| #include "sw_i2c.h" | ||
|
|
||
| // #include "stm32f1xx_hal.h" | ||
| #include "at32f435_437_gpio.h" | ||
|
|
||
| #define SW_I2C1_SCL_PORT GPIOA | ||
| #define SW_I2C1_SDA_PORT GPIOA | ||
| #define SW_I2C1_SCL_PIN GPIO_PIN_15 | ||
| #define SW_I2C1_SDA_PIN GPIO_PIN_14 | ||
|
|
||
|
|
||
| static void GPIO_SetBits(gpio_type *GPIOx, uint16_t GPIO_Pin) | ||
| { | ||
| gpio_bits_set(GPIOx, GPIO_Pin); | ||
| } | ||
|
|
||
| static void GPIO_ResetBits(gpio_type *GPIOx, uint16_t GPIO_Pin) | ||
| { | ||
| gpio_bits_reset(GPIOx, GPIO_Pin); | ||
| } | ||
|
|
||
| static uint8_t GPIO_ReadInputDataBit(gpio_type *GPIOx, uint16_t GPIO_Pin) | ||
| { | ||
| return (uint8_t)gpio_input_data_bit_read(GPIOx, GPIO_Pin); | ||
| } | ||
|
|
||
| static void sda_in_mode(void) | ||
| { | ||
| static gpio_init_type GPIO_InitStruct = | ||
| { | ||
| //.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER, | ||
| //.gpio_out_type = GPIO_OUTPUT_PUSH_PULL, | ||
| .gpio_mode = GPIO_MODE_INPUT, | ||
| .gpio_pull = GPIO_PULL_UP, | ||
| .gpio_pins = SW_I2C1_SDA_PIN | ||
| }; | ||
| gpio_init(SW_I2C1_SDA_PORT, &GPIO_InitStruct); | ||
| } | ||
|
|
||
| static void sda_out_mode(void) | ||
| { | ||
| static gpio_init_type GPIO_InitStruct = | ||
| { | ||
| .gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER, | ||
| .gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN, | ||
| .gpio_mode = GPIO_MODE_OUTPUT, | ||
| .gpio_pull = GPIO_PULL_NONE, | ||
| .gpio_pins = SW_I2C1_SDA_PIN | ||
| }; | ||
| gpio_init(SW_I2C1_SDA_PORT, &GPIO_InitStruct); | ||
| } | ||
|
|
||
| static void scl_in_mode(void) | ||
| { | ||
| static gpio_init_type GPIO_InitStruct = | ||
| { | ||
| .gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER, | ||
| //.gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN, | ||
| .gpio_mode = GPIO_MODE_INPUT, | ||
| .gpio_pull = GPIO_PULL_UP, | ||
| .gpio_pins = SW_I2C1_SCL_PIN | ||
| }; | ||
| gpio_init(SW_I2C1_SCL_PORT, &GPIO_InitStruct); | ||
| } | ||
|
|
||
| static void scl_out_mode(void) | ||
| { | ||
| static gpio_init_type GPIO_InitStruct = | ||
| { | ||
| .gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER, | ||
| .gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN, | ||
| .gpio_mode = GPIO_MODE_OUTPUT, | ||
| .gpio_pull = GPIO_PULL_NONE, | ||
| .gpio_pins = SW_I2C1_SCL_PIN | ||
| }; | ||
| gpio_init(SW_I2C1_SCL_PORT, &GPIO_InitStruct); | ||
| } | ||
|
|
||
| static int sw_i2c_port_initial(void) | ||
| { | ||
| crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE); | ||
| static gpio_init_type GPIO_InitStruct = | ||
| { | ||
| .gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER, | ||
| .gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN, | ||
| .gpio_mode = GPIO_MODE_OUTPUT, | ||
| .gpio_pull = GPIO_PULL_NONE | ||
| }; | ||
|
|
||
| // i2c_sw SCL | ||
| GPIO_InitStruct.Pin = SW_I2C1_SCL_PIN; | ||
| gpio_init(SW_I2C1_SCL_PORT, &GPIO_InitStruct); | ||
| // i2c_sw SDA | ||
| GPIO_InitStruct.Pin = SW_I2C1_SDA_PIN; | ||
| gpio_init(SW_I2C1_SDA_PORT, &GPIO_InitStruct); | ||
| return 0; | ||
| } | ||
|
|
||
| static void sw_i2c_port_delay_us(uint32_t us) | ||
| { | ||
| // TODO: сделать таймерную задержку | ||
| uint32_t nCount = us/10*25; | ||
| for (; nCount != 0; nCount--); | ||
| } | ||
|
|
||
| static int sw_i2c_port_io_ctl(uint8_t opt, void *param) | ||
| { | ||
| int ret = -1; | ||
| switch (opt) | ||
| { | ||
| case HAL_IO_OPT_SET_SDA_HIGH: | ||
| gpio_bits_set(SW_I2C1_SDA_PORT, SW_I2C1_SDA_PIN); | ||
| break; | ||
| case HAL_IO_OPT_SET_SDA_LOW: | ||
| gpio_bits_reset(SW_I2C1_SDA_PORT, SW_I2C1_SDA_PIN); | ||
| break; | ||
| case HAL_IO_OPT_GET_SDA_LEVEL: | ||
| ret = gpio_input_data_bit_read(SW_I2C1_SDA_PORT, SW_I2C1_SDA_PIN); | ||
| break; | ||
| case HAL_IO_OPT_SET_SDA_INPUT: | ||
| sda_in_mode(); | ||
| break; | ||
| case HAL_IO_OPT_SET_SDA_OUTPUT: | ||
| sda_out_mode(); | ||
| break; | ||
| case HAL_IO_OPT_SET_SCL_HIGH: | ||
| gpio_bits_set(SW_I2C1_SCL_PORT, SW_I2C1_SCL_PIN); | ||
| break; | ||
| case HAL_IO_OPT_SET_SCL_LOW: | ||
| gpio_bits_reset(SW_I2C1_SCL_PORT, SW_I2C1_SCL_PIN); | ||
| break; | ||
| case HAL_IO_OPT_GET_SCL_LEVEL: | ||
| ret = gpio_input_data_bit_read(SW_I2C1_SCL_PORT, SW_I2C1_SCL_PIN); | ||
| break; | ||
| case HAL_IO_OPT_SET_SCL_INPUT: | ||
| scl_in_mode(); | ||
| break; | ||
| case HAL_IO_OPT_SET_SCL_OUTPUT: | ||
| scl_out_mode(); | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
| return ret; | ||
| } | ||
|
|
||
|
|
||
| sw_i2c_t sw_i2c_at32_generic = { | ||
| .hal_init = sw_i2c_port_initial, | ||
| .hal_io_ctl = sw_i2c_port_io_ctl, | ||
| .hal_delay_us = sw_i2c_port_delay_us, | ||
| }; |
File renamed without changes.
File renamed without changes.