94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2020 Joey Castillo
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "watch_i2c.h"
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struct io_descriptor *I2C_0_io;
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void watch_enable_i2c(void) {
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I2C_0_init();
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i2c_m_sync_get_io_descriptor(&I2C_0, &I2C_0_io);
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i2c_m_sync_enable(&I2C_0);
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}
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void watch_disable_i2c(void) {
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i2c_m_sync_disable(&I2C_0);
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hri_mclk_clear_APBCMASK_SERCOM1_bit(MCLK);
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}
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void watch_i2c_send(int16_t addr, uint8_t *buf, uint16_t length) {
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i2c_m_sync_set_periphaddr(&I2C_0, addr, I2C_M_SEVEN);
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io_write(I2C_0_io, buf, length);
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}
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void watch_i2c_receive(int16_t addr, uint8_t *buf, uint16_t length) {
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i2c_m_sync_set_periphaddr(&I2C_0, addr, I2C_M_SEVEN);
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io_read(I2C_0_io, buf, length);
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}
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void watch_i2c_write8(int16_t addr, uint8_t reg, uint8_t data) {
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uint8_t buf[2];
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buf[0] = reg;
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buf[1] = data;
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watch_i2c_send(addr, (uint8_t *)&buf, 2);
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}
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uint8_t watch_i2c_read8(int16_t addr, uint8_t reg) {
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uint8_t data;
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watch_i2c_send(addr, (uint8_t *)®, 1);
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watch_i2c_receive(addr, (uint8_t *)&data, 1);
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return data;
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}
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uint16_t watch_i2c_read16(int16_t addr, uint8_t reg) {
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uint16_t data;
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watch_i2c_send(addr, (uint8_t *)®, 1);
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watch_i2c_receive(addr, (uint8_t *)&data, 2);
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return data;
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}
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uint32_t watch_i2c_read24(int16_t addr, uint8_t reg) {
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uint32_t data;
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data = 0;
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watch_i2c_send(addr, (uint8_t *)®, 1);
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watch_i2c_receive(addr, (uint8_t *)&data, 3);
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return data << 8;
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}
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uint32_t watch_i2c_read32(int16_t addr, uint8_t reg) {
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uint32_t data;
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watch_i2c_send(addr, (uint8_t *)®, 1);
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watch_i2c_receive(addr, (uint8_t *)&data, 4);
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return data;
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}
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