comparison: components/esp32-owb/owb_gpio.c
components/esp32-owb/owb_gpio.c
- changeset 72
- acc1904cd70d
- parent 0
- 88d965579617
equal
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| 71:995557380e5f | 72:acc1904cd70d |
|---|---|
| 36 #include "freertos/FreeRTOS.h" | 36 #include "freertos/FreeRTOS.h" |
| 37 #include "freertos/task.h" | 37 #include "freertos/task.h" |
| 38 #include "esp_log.h" | 38 #include "esp_log.h" |
| 39 #include "sdkconfig.h" | 39 #include "sdkconfig.h" |
| 40 #include "driver/gpio.h" | 40 #include "driver/gpio.h" |
| 41 #include "rom/ets_sys.h" // for ets_delay_us() | |
| 42 #include "rom/gpio.h" // for gpio_pad_select_gpio() | |
| 41 | 43 |
| 42 #include "owb.h" | 44 #include "owb.h" |
| 43 #include "owb_gpio.h" | 45 #include "owb_gpio.h" |
| 44 | 46 |
| 45 static const char * TAG = "owb_gpio"; | 47 static const char * TAG = "owb_gpio"; |
| 61 /// @cond ignore | 63 /// @cond ignore |
| 62 struct _OneWireBus_Timing | 64 struct _OneWireBus_Timing |
| 63 { | 65 { |
| 64 uint32_t A, B, C, D, E, F, G, H, I, J; | 66 uint32_t A, B, C, D, E, F, G, H, I, J; |
| 65 }; | 67 }; |
| 66 //// @endcond | 68 /// @endcond |
| 67 | 69 |
| 68 // 1-Wire timing delays (standard) in microseconds. | 70 // 1-Wire timing delays (standard) in microseconds. |
| 69 // Labels and values are from https://www.maximintegrated.com/en/app-notes/index.mvp/id/126 | 71 // Labels and values are from https://www.maximintegrated.com/en/app-notes/index.mvp/id/126 |
| 70 static const struct _OneWireBus_Timing _StandardTiming = { | 72 static const struct _OneWireBus_Timing _StandardTiming = { |
| 71 6, // A - read/write "1" master pull DQ low duration | 73 6, // A - read/write "1" master pull DQ low duration |
| 83 static void _us_delay(uint32_t time_us) | 85 static void _us_delay(uint32_t time_us) |
| 84 { | 86 { |
| 85 ets_delay_us(time_us); | 87 ets_delay_us(time_us); |
| 86 } | 88 } |
| 87 | 89 |
| 90 /// @cond ignore | |
| 88 #define info_from_bus(owb) container_of(owb, owb_gpio_driver_info, bus) | 91 #define info_from_bus(owb) container_of(owb, owb_gpio_driver_info, bus) |
| 92 /// @endcond | |
| 89 | 93 |
| 90 /** | 94 /** |
| 91 * @brief Generate a 1-Wire reset (initialization). | 95 * @brief Generate a 1-Wire reset (initialization). |
| 92 * @param[in] bus Initialised bus instance. | 96 * @param[in] bus Initialised bus instance. |
| 93 * @param[out] is_present true if device is present, otherwise false. | 97 * @param[out] is_present true if device is present, otherwise false. |
| 257 .reset = _reset, | 261 .reset = _reset, |
| 258 .write_bits = _write_bits, | 262 .write_bits = _write_bits, |
| 259 .read_bits = _read_bits | 263 .read_bits = _read_bits |
| 260 }; | 264 }; |
| 261 | 265 |
| 262 OneWireBus* owb_gpio_initialize(owb_gpio_driver_info *driver_info, int gpio) | 266 OneWireBus* owb_gpio_initialize(owb_gpio_driver_info * driver_info, int gpio) |
| 263 { | 267 { |
| 264 ESP_LOGI(TAG, "%s(): gpio %d\n", __func__, gpio); | 268 ESP_LOGD(TAG, "%s(): gpio %d\n", __func__, gpio); |
| 265 | 269 |
| 266 driver_info->gpio = gpio; | 270 driver_info->gpio = gpio; |
| 267 driver_info->bus.driver = &gpio_function_table; | 271 driver_info->bus.driver = &gpio_function_table; |
| 268 driver_info->bus.timing = &_StandardTiming; | 272 driver_info->bus.timing = &_StandardTiming; |
| 273 driver_info->bus.strong_pullup_gpio = GPIO_NUM_NC; | |
| 269 | 274 |
| 270 // platform specific: | 275 // platform specific: |
| 271 gpio_pad_select_gpio(driver_info->gpio); | 276 gpio_pad_select_gpio(driver_info->gpio); |
| 272 | 277 |
| 273 #ifdef PHY_DEBUG | 278 #ifdef PHY_DEBUG |
