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Color Oled(SSD1331) connect to STMicroelectronics Nucleo-F466
mbed-os/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL43Z/spi_api.c
- Committer:
- kadonotakashi
- Date:
- 2018-10-10
- Revision:
- 0:8fdf9a60065b
File content as of revision 0:8fdf9a60065b:
/* mbed Microcontroller Library * Copyright (c) 2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <math.h> #include "mbed_assert.h" #include "spi_api.h" #if DEVICE_SPI #include "cmsis.h" #include "pinmap.h" #include "mbed_error.h" #include "fsl_spi.h" #include "peripheral_clock_defines.h" #include "PeripheralPins.h" /* Array of SPI peripheral base address. */ static SPI_Type *const spi_address[] = SPI_BASE_PTRS; /* Array of SPI bus clock frequencies */ static clock_name_t const spi_clocks[] = SPI_CLOCK_FREQS; void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel) { // determine the SPI to use uint32_t spi_mosi = pinmap_peripheral(mosi, PinMap_SPI_MOSI); uint32_t spi_miso = pinmap_peripheral(miso, PinMap_SPI_MISO); uint32_t spi_sclk = pinmap_peripheral(sclk, PinMap_SPI_SCLK); uint32_t spi_ssel = pinmap_peripheral(ssel, PinMap_SPI_SSEL); uint32_t spi_data = pinmap_merge(spi_mosi, spi_miso); uint32_t spi_cntl = pinmap_merge(spi_sclk, spi_ssel); obj->instance = pinmap_merge(spi_data, spi_cntl); MBED_ASSERT((int)obj->instance != NC); // pin out the spi pins pinmap_pinout(mosi, PinMap_SPI_MOSI); pinmap_pinout(miso, PinMap_SPI_MISO); pinmap_pinout(sclk, PinMap_SPI_SCLK); if (ssel != NC) { pinmap_pinout(ssel, PinMap_SPI_SSEL); } } void spi_free(spi_t *obj) { SPI_Deinit(spi_address[obj->instance]); } void spi_format(spi_t *obj, int bits, int mode, int slave) { spi_master_config_t master_config; spi_slave_config_t slave_config; if ((bits != 8) && (bits != 16)) { error("Only 8bits and 16bits SPI supported"); return; } if (slave) { /* Slave config */ SPI_SlaveGetDefaultConfig(&slave_config); slave_config.dataMode = (bits == 16) ? kSPI_16BitMode : kSPI_8BitMode; slave_config.polarity = (mode & 0x2) ? kSPI_ClockPolarityActiveLow : kSPI_ClockPolarityActiveHigh; slave_config.phase = (mode & 0x1) ? kSPI_ClockPhaseSecondEdge : kSPI_ClockPhaseFirstEdge; SPI_SlaveInit(spi_address[obj->instance], &slave_config); } else { /* Master config */ SPI_MasterGetDefaultConfig(&master_config); master_config.dataMode = (bits == 16) ? kSPI_16BitMode : kSPI_8BitMode; master_config.polarity = (mode & 0x2) ? kSPI_ClockPolarityActiveLow : kSPI_ClockPolarityActiveHigh; master_config.phase = (mode & 0x1) ? kSPI_ClockPhaseSecondEdge : kSPI_ClockPhaseFirstEdge; master_config.direction = kSPI_MsbFirst; SPI_MasterInit(spi_address[obj->instance], &master_config, CLOCK_GetFreq(spi_clocks[obj->instance])); } } void spi_frequency(spi_t *obj, int hz) { SPI_MasterSetBaudRate(spi_address[obj->instance], (uint32_t)hz, CLOCK_GetFreq(spi_clocks[obj->instance])); } static inline int spi_readable(spi_t * obj) { return (SPI_GetStatusFlags(spi_address[obj->instance]) & kSPI_RxBufferFullFlag); } int spi_master_write(spi_t *obj, int value) { spi_transfer_t xfer = {0}; uint32_t rx_data; SPI_Type *base = spi_address[obj->instance]; /* SPI master start transfer */ xfer.txData = (uint8_t *)&value; xfer.rxData = (uint8_t *)&rx_data; xfer.dataSize = ((base->C2 & SPI_C2_SPIMODE_MASK) >> SPI_C2_SPIMODE_SHIFT) + 1U; SPI_MasterTransferBlocking(base, &xfer); return rx_data & 0xffff; } int spi_master_block_write(spi_t *obj, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, char write_fill) { int total = (tx_length > rx_length) ? tx_length : rx_length; for (int i = 0; i < total; i++) { char out = (i < tx_length) ? tx_buffer[i] : write_fill; char in = spi_master_write(obj, out); if (i < rx_length) { rx_buffer[i] = in; } } return total; } int spi_slave_receive(spi_t *obj) { return spi_readable(obj); } int spi_slave_read(spi_t *obj) { uint32_t rx_data; while (!spi_readable(obj)); rx_data = SPI_ReadData(spi_address[obj->instance]); return rx_data & 0xffff; } void spi_slave_write(spi_t *obj, int value) { SPI_Type *base = spi_address[obj->instance]; size_t size = ((base->C2 & SPI_C2_SPIMODE_MASK) >> SPI_C2_SPIMODE_SHIFT) + 1U; SPI_WriteBlocking(spi_address[obj->instance], (uint8_t *)&value, size); } #endif