diff options
Diffstat (limited to 'ports/nrf/hal/hal_spi.c')
| -rw-r--r-- | ports/nrf/hal/hal_spi.c | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/ports/nrf/hal/hal_spi.c b/ports/nrf/hal/hal_spi.c deleted file mode 100644 index 2de203d23..000000000 --- a/ports/nrf/hal/hal_spi.c +++ /dev/null @@ -1,127 +0,0 @@ -/* - * This file is part of the MicroPython project, http://micropython.org/ - * - * The MIT License (MIT) - * - * Copyright (c) 2016 Glenn Ruben Bakke - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include <stdint.h> -#include <stdio.h> - -#include "mphalport.h" -#include "hal_spi.h" - -#ifdef HAL_SPI_MODULE_ENABLED - -static const uint32_t hal_spi_frequency_lookup[] = { - SPI_FREQUENCY_FREQUENCY_K125, // 125 kbps - SPI_FREQUENCY_FREQUENCY_K250, // 250 kbps - SPI_FREQUENCY_FREQUENCY_K500, // 500 kbps - SPI_FREQUENCY_FREQUENCY_M1, // 1 Mbps - SPI_FREQUENCY_FREQUENCY_M2, // 2 Mbps - SPI_FREQUENCY_FREQUENCY_M4, // 4 Mbps - SPI_FREQUENCY_FREQUENCY_M8 // 8 Mbps -}; - -void hal_spi_master_init(NRF_SPI_Type * p_instance, hal_spi_init_t const * p_spi_init) { - hal_gpio_cfg_pin(p_spi_init->clk_pin->port, p_spi_init->clk_pin->pin, HAL_GPIO_MODE_OUTPUT, HAL_GPIO_PULL_DISABLED); - hal_gpio_cfg_pin(p_spi_init->mosi_pin->port, p_spi_init->mosi_pin->pin, HAL_GPIO_MODE_OUTPUT, HAL_GPIO_PULL_DISABLED); - hal_gpio_cfg_pin(p_spi_init->miso_pin->port, p_spi_init->miso_pin->pin, HAL_GPIO_MODE_INPUT, HAL_GPIO_PULL_DISABLED); - -#if NRF51 - p_instance->PSELSCK = p_spi_init->clk_pin->pin; - p_instance->PSELMOSI = p_spi_init->mosi_pin->pin; - p_instance->PSELMISO = p_spi_init->miso_pin->pin; -#else - p_instance->PSEL.SCK = p_spi_init->clk_pin->pin; - p_instance->PSEL.MOSI = p_spi_init->mosi_pin->pin; - p_instance->PSEL.MISO = p_spi_init->miso_pin->pin; - -#if NRF52840_XXAA - p_instance->PSEL.SCK |= (p_spi_init->clk_pin->port << SPI_PSEL_SCK_PORT_Pos); - p_instance->PSEL.MOSI |= (p_spi_init->mosi_pin->port << SPI_PSEL_MOSI_PORT_Pos); - p_instance->PSEL.MISO |= (p_spi_init->miso_pin->port << SPI_PSEL_MISO_PORT_Pos); -#endif - -#endif - - p_instance->FREQUENCY = hal_spi_frequency_lookup[p_spi_init->freq]; - - uint32_t mode; - switch (p_spi_init->mode) { - case HAL_SPI_MODE_CPOL0_CPHA0: - mode = (SPI_CONFIG_CPHA_Leading << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveHigh << SPI_CONFIG_CPOL_Pos); - break; - case HAL_SPI_MODE_CPOL0_CPHA1: - mode = (SPI_CONFIG_CPHA_Trailing << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveHigh << SPI_CONFIG_CPOL_Pos); - break; - case HAL_SPI_MODE_CPOL1_CPHA0: - mode = (SPI_CONFIG_CPHA_Leading << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveLow << SPI_CONFIG_CPOL_Pos); - break; - case HAL_SPI_MODE_CPOL1_CPHA1: - mode = (SPI_CONFIG_CPHA_Trailing << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveLow << SPI_CONFIG_CPOL_Pos); - break; - default: - mode = 0; - break; - } - - if (p_spi_init->firstbit == HAL_SPI_LSB_FIRST) { - p_instance->CONFIG = (mode | (SPI_CONFIG_ORDER_LsbFirst << SPI_CONFIG_ORDER_Pos)); - } else { - p_instance->CONFIG = (mode | (SPI_CONFIG_ORDER_MsbFirst << SPI_CONFIG_ORDER_Pos)); - } - - p_instance->EVENTS_READY = 0U; - p_instance->ENABLE = (SPI_ENABLE_ENABLE_Enabled << SPI_ENABLE_ENABLE_Pos); -} - -void hal_spi_master_tx_rx(NRF_SPI_Type * p_instance, - uint16_t transfer_size, - const uint8_t * tx_data, - uint8_t * rx_data) { - - uint16_t number_of_txd_bytes = 0; - - p_instance->EVENTS_READY = 0; - - while (number_of_txd_bytes < transfer_size) { - p_instance->TXD = (uint32_t)(tx_data[number_of_txd_bytes]); - - // wait for the transaction complete or timeout (about 10ms - 20 ms) - while (p_instance->EVENTS_READY == 0) { - ; - } - - p_instance->EVENTS_READY = 0; - - uint8_t in_byte = (uint8_t)p_instance->RXD; - - if (rx_data != NULL) { - rx_data[number_of_txd_bytes] = in_byte; - } - - number_of_txd_bytes++; - }; -} - -#endif // HAL_SPI_MODULE_ENABLED |