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| author | Stephen Caudle <stephen@caudle.info> | 2015-07-27 21:39:45 -0400 |
|---|---|---|
| committer | Stephen Caudle <stephen@caudle.info> | 2015-07-27 22:42:45 -0400 |
| commit | 6202fcbb8b5779f38088540f2c699aeb8d21dc5c (patch) | |
| tree | 957aa4337c3fb7705fbea51c59fcd08f0286f874 /testhal/NRF51/NRF51822/SPI/main.c | |
| parent | eab925c4925e10684973c8e725ff66f5c76660de (diff) | |
| download | ChibiOS-Contrib-6202fcbb8b5779f38088540f2c699aeb8d21dc5c.tar.gz ChibiOS-Contrib-6202fcbb8b5779f38088540f2c699aeb8d21dc5c.tar.bz2 ChibiOS-Contrib-6202fcbb8b5779f38088540f2c699aeb8d21dc5c.zip | |
Add SPI support for nRF51
Diffstat (limited to 'testhal/NRF51/NRF51822/SPI/main.c')
| -rw-r--r-- | testhal/NRF51/NRF51822/SPI/main.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/testhal/NRF51/NRF51822/SPI/main.c b/testhal/NRF51/NRF51822/SPI/main.c new file mode 100644 index 0000000..8d9c089 --- /dev/null +++ b/testhal/NRF51/NRF51822/SPI/main.c @@ -0,0 +1,152 @@ +/*
+ Copyright (C) 2015 Stephen Caudle
+
+ 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 "ch.h"
+#include "hal.h"
+
+/*
+ * 1Mbps speed SPI configuration (1MHz, CPHA=0, CPOL=0, LSb first).
+ */
+
+static const SPIConfig hs_spicfg = {
+ .end_cb=NULL,
+ .freq=NRF51_SPI_FREQ_1MBPS,
+ .sckpad=SPI_SCK,
+ .mosipad=SPI_MOSI,
+ .misopad=SPI_MISO,
+ .sspad=SPI_SS,
+ .lsbfirst=TRUE,
+ .mode=0
+};
+
+static const SPIConfig ls_spicfg = {
+ .end_cb=NULL,
+ .freq=NRF51_SPI_FREQ_250KBPS,
+ .sckpad=SPI_SCK,
+ .mosipad=SPI_MOSI,
+ .misopad=SPI_MISO,
+ .sspad=SPI_SS,
+ .lsbfirst=TRUE,
+ .mode=0
+};
+
+
+/*
+ * SPI TX and RX buffers.
+ */
+static uint8_t txbuf[512];
+static uint8_t rxbuf[512];
+
+/*
+ * SPI bus contender 1.
+ */
+static THD_WORKING_AREA(spi_thread_1_wa, 256);
+static THD_FUNCTION(spi_thread_1, p) {
+
+ (void)p;
+ chRegSetThreadName("SPI thread 1");
+ while (true) {
+ spiAcquireBus(&SPID1); /* Acquire ownership of the bus. */
+ palSetPad(SPI_PORT_SPI0, LED0); /* LED ON. */
+ spiStart(&SPID1, &hs_spicfg); /* Setup transfer parameters. */
+ spiSelect(&SPID1); /* Slave Select assertion. */
+ spiExchange(&SPID1, 512,
+ txbuf, rxbuf); /* Atomic transfer operations. */
+ spiUnselect(&SPID1); /* Slave Select de-assertion. */
+ spiReleaseBus(&SPID1); /* Ownership release. */
+ }
+}
+
+/*
+ * SPI bus contender 2.
+ */
+static THD_WORKING_AREA(spi_thread_2_wa, 256);
+static THD_FUNCTION(spi_thread_2, p) {
+
+ (void)p;
+ chRegSetThreadName("SPI thread 2");
+ while (true) {
+ spiAcquireBus(&SPID1); /* Acquire ownership of the bus. */
+ palClearPad(SPI_PORT_SPI0, LED0); /* LED OFF. */
+ spiStart(&SPID1, &ls_spicfg); /* Setup transfer parameters. */
+ spiSelect(&SPID1); /* Slave Select assertion. */
+ spiExchange(&SPID1, 512,
+ txbuf, rxbuf); /* Atomic transfer operations. */
+ spiUnselect(&SPID1); /* Slave Select de-assertion. */
+ spiReleaseBus(&SPID1); /* Ownership release. */
+ }
+}
+/*
+ * This is a periodic thread that does absolutely nothing except flashing
+ * a LED.
+ */
+static THD_WORKING_AREA(blinker_wa, 128);
+static THD_FUNCTION(blinker, arg) {
+
+ (void)arg;
+ chRegSetThreadName("blinker");
+ while (true) {
+ palSetPad(SPI_PORT_SPI0, LED1);
+ chThdSleepMilliseconds(500);
+ palClearPad(SPI_PORT_SPI0, LED1);
+ chThdSleepMilliseconds(500);
+ }
+}
+
+/*
+ * Application entry point.
+ */
+int main(void) {
+ unsigned i;
+
+ /*
+ * System initializations.
+ * - HAL initialization, this also initializes the configured device drivers
+ * and performs the board-specific initializations.
+ * - Kernel initialization, the main() function becomes a thread and the
+ * RTOS is active.
+ */
+ halInit();
+ chSysInit();
+
+ /*
+ * Prepare transmit pattern.
+ */
+ for (i = 0; i < sizeof(txbuf); i++)
+ txbuf[i] = (uint8_t)i;
+
+ /*
+ * Starting the transmitter and receiver threads.
+ */
+ chThdCreateStatic(spi_thread_1_wa, sizeof(spi_thread_1_wa),
+ NORMALPRIO + 1, spi_thread_1, NULL);
+ chThdCreateStatic(spi_thread_2_wa, sizeof(spi_thread_2_wa),
+ NORMALPRIO + 1, spi_thread_2, NULL);
+
+ /*
+ * Starting the blinker thread.
+ */
+ chThdCreateStatic(blinker_wa, sizeof(blinker_wa),
+ NORMALPRIO-1, blinker, NULL);
+
+ /*
+ * Normal main() thread activity, in this demo it does nothing.
+ */
+ while (true) {
+ chThdSleepMilliseconds(500);
+ }
+ return 0;
+}
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