126 lines
4.4 KiB
C
Executable File
126 lines
4.4 KiB
C
Executable File
/*
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* Copyright (c) 2021, Joey Castillo
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* SAML22 starter project is Copyright (c) 2014-2017, Alex Taradov <alex@taradov.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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//-----------------------------------------------------------------------------
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <stdio.h>
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#include "saml22.h"
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#include "hal_init.h"
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#include "peripheral_clk_config.h"
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#include "hal_gpio.h"
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#include "atmel_start_pins.h"
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#include "watch.h"
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//-----------------------------------------------------------------------------
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HAL_GPIO_PIN(UART_TX, B, 0)
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HAL_GPIO_PIN(UART_RX, B, 2)
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Watch watch;
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//-----------------------------------------------------------------------------
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static void uart_init(uint32_t baud) {
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uint64_t br = (uint64_t)65536 * (CONF_CPU_FREQUENCY - 16 * baud) / CONF_CPU_FREQUENCY;
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HAL_GPIO_UART_TX_out();
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HAL_GPIO_UART_TX_pmuxen(HAL_GPIO_PMUX_C);
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HAL_GPIO_UART_RX_in();
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HAL_GPIO_UART_RX_pmuxen(HAL_GPIO_PMUX_C);
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MCLK->APBCMASK.reg |= MCLK_APBCMASK_SERCOM3;
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GCLK->PCHCTRL[SERCOM3_GCLK_ID_CORE].reg = GCLK_PCHCTRL_GEN(0) | GCLK_PCHCTRL_CHEN;
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while (0 == (GCLK->PCHCTRL[SERCOM3_GCLK_ID_CORE].reg & GCLK_PCHCTRL_CHEN));
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SERCOM3->USART.CTRLA.reg =
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SERCOM_USART_CTRLA_DORD | SERCOM_USART_CTRLA_MODE(1/*USART_INT_CLK*/) |
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SERCOM_USART_CTRLA_RXPO(0/*PAD0*/) | SERCOM_USART_CTRLA_TXPO(1/*PAD2*/);
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SERCOM3->USART.CTRLB.reg = SERCOM_USART_CTRLB_RXEN | SERCOM_USART_CTRLB_TXEN |
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SERCOM_USART_CTRLB_CHSIZE(0/*8 bits*/);
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SERCOM3->USART.BAUD.reg = (uint16_t)br;
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SERCOM3->USART.CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE;
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}
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//-----------------------------------------------------------------------------
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static void uart_putc(char c) {
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while (!(SERCOM3->USART.INTFLAG.reg & SERCOM_USART_INTFLAG_DRE));
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SERCOM3->USART.DATA.reg = c;
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}
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//-----------------------------------------------------------------------------
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static void uart_puts(char *s) {
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while (*s) uart_putc(*s++);
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}
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//-----------------------------------------------------------------------------
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static void sys_init(void) {
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init_mcu();
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watch_init(&watch);
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watch_enable_display(&watch);
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watch_enable_led(&watch);
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watch_enable_date_time(&watch);
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watch_enable_analog(&watch, A0);
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watch_enable_buttons(&watch);
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watch_enable_i2c(&watch);
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}
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//-----------------------------------------------------------------------------
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int main(void) {
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sys_init();
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uart_init(115200);
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char buf[20] = {0};
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uart_puts("\n\nI2C Driver Test\n");
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uint8_t reset_cmd[] = {0xE0, 0xB6};
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watch_i2c_send(0x77, reset_cmd, 2);
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uart_puts("Reset BMP280\n");
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uint8_t chip_id_cmd = 0xD0;
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uint8_t chip_id = 0;
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watch_i2c_send(0x77, &chip_id_cmd, 1);
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uart_puts("Chip ID... ");
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watch_i2c_receive(0x77, &chip_id, 1);
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uart_puts("received!\n");
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sprintf(buf, "Chip ID is %#02x", chip_id);
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uart_puts(buf);
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uart_puts("\nDone\n");
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uint16_t red = 0;
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uint16_t green = 0;
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while (1) {
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}
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return 0;
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}
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