mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
7309171303
cpu, sam0_common: fix unused parameter in periph/spi
cpu, kinetis_common: fix unused parameter in periph/spi
cpu, cc2538: fix unused param in periph/i2c
cpu, cc2538: fix unused param in periph/spi
cpu, sam3: fix unused param in periph/spi
cpu, stm32_common: fix unused param in periph/pm
cpu, stm32f3: fix unused params in periph/i2c
cpu, nrf5x_common: fix unused param in periph/gpio
cpu, nrf5x_common: fix unused param in periph/spi
cpu, lpc2387: fix unused params in periph/spi
cpu, cc2538: fix unused params in radio/netdev
cpu, cc2650: fix unused params in periph/uart
cpu, lm4f120: fix unused param in periph/spi
cpu, lm4f120: fix unused params in periph/timer
cpu, lm4f120: fix unused params in periph/uart
cpu, stm32_common: fix unused params in periph/dac
cpu, stm32l0: fix unused params in periph/i2c
cpu, msp430fxyz: fix unused params in periph/uart
cpu, mips: fix unused params
cpu, cc430: fix unused-params in periph/timer
cpu, msp430fxyz: fix unused params in periph/spi
drivers, cc2420: fix unused param
cpu, mips32r2_common: fix unused params in periph/timer
cpu, cc2538: fix unused-param in periph/i2c
cpu, mips32r2_common: fix unused-param in periph/timer
cpu, msp430fxyz: fix unused params in periph/timer
cpu, atmega_common: fix unused params in periph/spi
driver, nrfmin: fix unused params
cpu, cc2538_rf: fix unused params
driver, netdev_ieee802514: fix unused param
cpu, mip_pic32m: fix unused params
cpu, lpc2387: fix unused params in periph/pwm
tests/driver_sdcard_spi: fix unused params
cpu, sam3: fix unused param in periph/pwm
tests/driver_dynamixel: fix unused params, and style issues
cpu, cc430: fix unused param in periph/rtc
cpu, atmega_common: fix unused params in periph/i2c
119 lines
2.6 KiB
C
119 lines
2.6 KiB
C
/*
|
|
* Copyright (C) 2014-2016 Freie Universität Berlin
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU Lesser
|
|
* General Public License v2.1. See the file LICENSE in the top level
|
|
* directory for more details.
|
|
*/
|
|
|
|
/**
|
|
* @ingroup cpu_nrf5x_common
|
|
* @ingroup drivers_periph_spi
|
|
* @{
|
|
*
|
|
* @file
|
|
* @brief Low-level SPI driver implementation
|
|
*
|
|
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
|
|
* @author Frank Holtz <frank-riot2015@holtznet.de>
|
|
* @author Jan Wagner <mail@jwagner.eu>
|
|
*
|
|
* @}
|
|
*/
|
|
|
|
#include "cpu.h"
|
|
#include "mutex.h"
|
|
#include "assert.h"
|
|
#include "periph/spi.h"
|
|
#include "periph/gpio.h"
|
|
|
|
/**
|
|
* @brief array holding one pre-initialized mutex for each SPI device
|
|
*/
|
|
static mutex_t locks[SPI_NUMOF];
|
|
|
|
static inline NRF_SPI_Type *dev(spi_t bus)
|
|
{
|
|
return spi_config[bus].dev;
|
|
}
|
|
|
|
void spi_init(spi_t bus)
|
|
{
|
|
assert(bus < SPI_NUMOF);
|
|
|
|
/* initialize mutex */
|
|
mutex_init(&locks[bus]);
|
|
/* initialize pins */
|
|
spi_init_pins(bus);
|
|
}
|
|
|
|
void spi_init_pins(spi_t bus)
|
|
{
|
|
/* set pin direction */
|
|
gpio_init(spi_config[bus].sclk, GPIO_OUT);
|
|
gpio_init(spi_config[bus].mosi, GPIO_OUT);
|
|
gpio_init(spi_config[bus].miso, GPIO_IN);
|
|
/* select pins for the SPI device */
|
|
SPI_SCKSEL = spi_config[bus].sclk;
|
|
SPI_MOSISEL = spi_config[bus].mosi;
|
|
SPI_MISOSEL = spi_config[bus].miso;
|
|
}
|
|
|
|
int spi_acquire(spi_t bus, spi_cs_t cs, spi_mode_t mode, spi_clk_t clk)
|
|
{
|
|
(void) cs;
|
|
|
|
mutex_lock(&locks[bus]);
|
|
#ifdef CPU_FAM_NRF51
|
|
/* power on the bus (NRF51 only) */
|
|
dev(bus)->POWER = 1;
|
|
#endif
|
|
/* configure bus */
|
|
dev(bus)->CONFIG = mode;
|
|
dev(bus)->FREQUENCY = clk;
|
|
/* enable the bus */
|
|
dev(bus)->ENABLE = 1;
|
|
|
|
return SPI_OK;
|
|
}
|
|
|
|
void spi_release(spi_t bus)
|
|
{
|
|
/* power off everything */
|
|
dev(bus)->ENABLE = 0;
|
|
#ifdef CPU_FAM_NRF51
|
|
dev(bus)->POWER = 0;
|
|
#endif
|
|
mutex_unlock(&locks[bus]);
|
|
}
|
|
|
|
void spi_transfer_bytes(spi_t bus, spi_cs_t cs, bool cont,
|
|
const void *out, void *in, size_t len)
|
|
{
|
|
const uint8_t *out_buf = out;
|
|
uint8_t *in_buf = in;
|
|
|
|
assert(out_buf || in_buf);
|
|
|
|
if (cs != SPI_CS_UNDEF) {
|
|
gpio_clear((gpio_t)cs);
|
|
}
|
|
|
|
for (int i = 0; i < (int)len; i++) {
|
|
uint8_t tmp = (out_buf) ? out_buf[i] : 0;
|
|
|
|
dev(bus)->EVENTS_READY = 0;
|
|
dev(bus)->TXD = (uint8_t)tmp;
|
|
while (dev(bus)->EVENTS_READY != 1);
|
|
tmp = (uint8_t)dev(bus)->RXD;
|
|
|
|
if (in_buf) {
|
|
in_buf[i] = tmp;
|
|
}
|
|
}
|
|
|
|
if ((cs != SPI_CS_UNDEF) && (!cont)) {
|
|
gpio_set((gpio_t)cs);
|
|
}
|
|
}
|