diff options
Diffstat (limited to 'watch-library/watch/watch_i2c.c')
-rw-r--r-- | watch-library/watch/watch_i2c.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/watch-library/watch/watch_i2c.c b/watch-library/watch/watch_i2c.c new file mode 100644 index 00000000..bded405b --- /dev/null +++ b/watch-library/watch/watch_i2c.c @@ -0,0 +1,86 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + struct io_descriptor *I2C_0_io; + +void watch_enable_i2c() { + I2C_0_init(); + i2c_m_sync_get_io_descriptor(&I2C_0, &I2C_0_io); + i2c_m_sync_enable(&I2C_0); +} + +void watch_i2c_send(int16_t addr, uint8_t *buf, uint16_t length) { + i2c_m_sync_set_periphaddr(&I2C_0, addr, I2C_M_SEVEN); + io_write(I2C_0_io, buf, length); +} + +void watch_i2c_receive(int16_t addr, uint8_t *buf, uint16_t length) { + i2c_m_sync_set_periphaddr(&I2C_0, addr, I2C_M_SEVEN); + io_read(I2C_0_io, buf, length); +} + +void watch_i2c_write8(int16_t addr, uint8_t reg, uint8_t data) { + uint8_t buf[2]; + buf[0] = reg; + buf[1] = data; + + watch_i2c_send(addr, (uint8_t *)&buf, 2); +} + +uint8_t watch_i2c_read8(int16_t addr, uint8_t reg) { + uint8_t data; + + watch_i2c_send(addr, (uint8_t *)®, 1); + watch_i2c_receive(addr, (uint8_t *)&data, 1); + + return data; +} + +uint16_t watch_i2c_read16(int16_t addr, uint8_t reg) { + uint16_t data; + + watch_i2c_send(addr, (uint8_t *)®, 1); + watch_i2c_receive(addr, (uint8_t *)&data, 2); + + return data; +} + +uint32_t watch_i2c_read24(int16_t addr, uint8_t reg) { + uint32_t data; + data = 0; + + watch_i2c_send(addr, (uint8_t *)®, 1); + watch_i2c_receive(addr, (uint8_t *)&data, 3); + + return data << 8; +} + +uint32_t watch_i2c_read32(int16_t addr, uint8_t reg) { + uint32_t data; + + watch_i2c_send(addr, (uint8_t *)®, 1); + watch_i2c_receive(addr, (uint8_t *)&data, 4); + + return data; +} |