diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/integration/nrfx/legacy/nrf_drv_twi.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/integration/nrfx/legacy/nrf_drv_twi.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/integration/nrfx/legacy/nrf_drv_twi.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/integration/nrfx/legacy/nrf_drv_twi.c new file mode 100644 index 0000000..9e619df --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/integration/nrfx/legacy/nrf_drv_twi.c @@ -0,0 +1,192 @@ +/** + * Copyright (c) 2017 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "nrf_drv_twi.h" +#include <nrf_delay.h> +#include <hal/nrf_gpio.h> + +#ifdef TWIM_PRESENT +#define INSTANCE_COUNT TWIM_COUNT +#else +#define INSTANCE_COUNT TWI_COUNT +#endif + +#define SCL_PIN_INIT_CONF \ + ( (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) \ + | (GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) \ + | (GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos) \ + | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) \ + | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos)) + +#define SDA_PIN_INIT_CONF SCL_PIN_INIT_CONF + +#define SDA_PIN_UNINIT_CONF \ + ( (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) \ + | (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) \ + | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) \ + | (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) \ + | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos)) + +#define SCL_PIN_UNINIT_CONF SDA_PIN_UNINIT_CONF + +#define SCL_PIN_INIT_CONF_CLR \ + ( (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) \ + | (GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) \ + | (GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos) \ + | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) \ + | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos)) + +#define SDA_PIN_INIT_CONF_CLR SCL_PIN_INIT_CONF_CLR + +static nrf_drv_twi_evt_handler_t m_handlers[INSTANCE_COUNT]; +static void * m_contexts[INSTANCE_COUNT]; + +static void twi_clear_bus(nrf_drv_twi_config_t const * p_config) +{ + NRF_GPIO->PIN_CNF[p_config->scl] = SCL_PIN_INIT_CONF; + NRF_GPIO->PIN_CNF[p_config->sda] = SDA_PIN_INIT_CONF; + + nrf_gpio_pin_set(p_config->scl); + nrf_gpio_pin_set(p_config->sda); + + NRF_GPIO->PIN_CNF[p_config->scl] = SCL_PIN_INIT_CONF_CLR; + NRF_GPIO->PIN_CNF[p_config->sda] = SDA_PIN_INIT_CONF_CLR; + + nrf_delay_us(4); + + for (int i = 0; i < 9; i++) + { + if (nrf_gpio_pin_read(p_config->sda)) + { + if (i == 0) + { + return; + } + else + { + break; + } + } + nrf_gpio_pin_clear(p_config->scl); + nrf_delay_us(4); + nrf_gpio_pin_set(p_config->scl); + nrf_delay_us(4); + } + nrf_gpio_pin_clear(p_config->sda); + nrf_delay_us(4); + nrf_gpio_pin_set(p_config->sda); +} + +#ifdef TWIM_PRESENT +static void twim_evt_handler(nrfx_twim_evt_t const * p_event, + void * p_context) +{ + uint32_t inst_idx = (uint32_t)p_context; + nrf_drv_twi_evt_t const event = + { + .type = (nrf_drv_twi_evt_type_t)p_event->type, + .xfer_desc = + { + .type = (nrf_drv_twi_xfer_type_t)p_event->xfer_desc.type, + .address = p_event->xfer_desc.address, + .primary_length = p_event->xfer_desc.primary_length, + .secondary_length = p_event->xfer_desc.secondary_length, + .p_primary_buf = p_event->xfer_desc.p_primary_buf, + .p_secondary_buf = p_event->xfer_desc.p_secondary_buf, + } + }; + m_handlers[inst_idx](&event, m_contexts[inst_idx]); +} +#endif // TWIM_PRESENT + +#ifdef TWI_PRESENT +static void twi_evt_handler(nrfx_twi_evt_t const * p_event, + void * p_context) +{ + uint32_t inst_idx = (uint32_t)p_context; + nrf_drv_twi_evt_t const event = + { + .type = (nrf_drv_twi_evt_type_t)p_event->type, + .xfer_desc = + { + .type = (nrf_drv_twi_xfer_type_t)p_event->xfer_desc.type, + .address = p_event->xfer_desc.address, + .primary_length = p_event->xfer_desc.primary_length, + .secondary_length = p_event->xfer_desc.secondary_length, + .p_primary_buf = p_event->xfer_desc.p_primary_buf, + .p_secondary_buf = p_event->xfer_desc.p_secondary_buf, + } + }; + m_handlers[inst_idx](&event, m_contexts[inst_idx]); +} +#endif // TWI_PRESENT + +ret_code_t nrf_drv_twi_init(nrf_drv_twi_t const * p_instance, + nrf_drv_twi_config_t const * p_config, + nrf_drv_twi_evt_handler_t event_handler, + void * p_context) +{ + uint32_t inst_idx = p_instance->inst_idx; + m_handlers[inst_idx] = event_handler; + m_contexts[inst_idx] = p_context; + + if(p_config->clear_bus_init) + { + /* Send clocks (max 9) until slave device back from stuck mode */ + twi_clear_bus(p_config); + } + + ret_code_t result = 0; + if (NRF_DRV_TWI_USE_TWIM) + { + result = nrfx_twim_init(&p_instance->u.twim, + (nrfx_twim_config_t const *)p_config, + event_handler ? twim_evt_handler : NULL, + (void *)inst_idx); + } + else if (NRF_DRV_TWI_USE_TWI) + { + result = nrfx_twi_init(&p_instance->u.twi, + (nrfx_twi_config_t const *)p_config, + event_handler ? twi_evt_handler : NULL, + (void *)inst_idx); + } + return result; +} |