88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
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/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "ch.h"
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#include "hal.h"
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/*
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* SPI configuration (8MHz, CPHA=0, CPOL=0, MSb first).
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*/
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static ROMCONST SPIConfig spicfg = {
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NULL,
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GPIOD,
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PD_LD10,
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0
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};
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/*
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* Transmit data.
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*/
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static ROMCONST uint8_t digits[32] = {
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0x24, 0xAF, 0xE0, 0xA2, 0x2B, 0x32, 0x30, 0xA7,
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0x20, 0x22, 0x21, 0x38, 0x74, 0xA8, 0x70, 0x71,
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0x04, 0x8F, 0xC0, 0x82, 0x0B, 0x12, 0x10, 0x87,
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0x00, 0x02, 0x01, 0x18, 0x54, 0x88, 0x50, 0x51
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};
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/*
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* Receive buffer.
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*/
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static uint8_t buffer[32];
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/*
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* Application entry point.
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*/
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void main(void) {
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/*
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* System initializations.
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* - HAL initialization, this also initializes the configured device drivers
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* and performs the board-specific initializations.
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* - Kernel initialization, the main() function becomes a thread and the
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* RTOS is active.
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*/
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halInit();
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chSysInit();
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/*
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* OS initialization.
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*/
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chSysInit();
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/*
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* Activates the SPI driver 1 using the driver default configuration.
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*/
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spiStart(&SPID1, &spicfg);
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/*
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* Normal main() thread activity.
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*/
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while (TRUE) {
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volatile uint8_t b;
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chThdSleepMilliseconds(1000);
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/* Exchanging data, if the pins MISO and MOSI are connected then the
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transmitted data is received back into the buffer. On the
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STM8S-Discovery board the pins are CN2-9 and CN2-10.*/
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spiSelect(&SPID1);
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spiExchange(&SPID1, sizeof(digits), digits, buffer);
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/* Polled transfers test.*/
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b = spiPolledExchange(&SPID1, 0x55);
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b = spiPolledExchange(&SPID1, 0xAA);
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spiUnselect(&SPID1);
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}
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}
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