diff options
Diffstat (limited to 'src/ds3231.rs')
-rw-r--r-- | src/ds3231.rs | 71 |
1 files changed, 42 insertions, 29 deletions
diff --git a/src/ds3231.rs b/src/ds3231.rs index 6800f6a..375ce21 100644 --- a/src/ds3231.rs +++ b/src/ds3231.rs @@ -4,8 +4,9 @@ use i2c::{I2C, TransDir, DutyType}; const DS3231_ADDR: u8 = 0b1101000; const DS3231_REG_SEC: u8 = 0x00; const DS3231_REG_CTL: u8 = 0x0e; +const DS3231_REG_TEMP: u8 = 0x11; -pub struct DS3231<'a, 'b>(I2C<'a, 'b>); +pub struct DS3231<'a, 'b: 'a>(&'a I2C<'a, 'b>); pub struct Date { pub second: u8, @@ -19,10 +20,14 @@ pub struct Date { pub am_enabled: bool } +pub struct Temp { + pub cels: i8, + pub quarter: u8 +} + impl<'a, 'b> DS3231<'a, 'b> { - pub fn new(i2c_reg: &'a stm32f103xx::i2c1::RegisterBlock, - rcc_reg: &'b stm32f103xx::rcc::RegisterBlock) -> DS3231<'a, 'b> { - DS3231(I2C::new(i2c_reg, rcc_reg)) + pub fn new(i2c: &'a I2C<'a, 'b>) -> DS3231<'a, 'b> { + DS3231(i2c) } fn bcd2dec(bcd: u8) -> u8 { @@ -33,33 +38,38 @@ impl<'a, 'b> DS3231<'a, 'b> { ((dec / 10) << 4) | (dec % 10) } - pub fn init(&self) { - let &DS3231(ref i2c) = self; - i2c.init(0x01, 400_000, DutyType::DUTY1); - i2c.start(true, true); - i2c.send_addr(DS3231_ADDR, TransDir::TRANSMITTER, true); - i2c.send(DS3231_REG_CTL, true); - i2c.send(0x00, true); - i2c.send(0x00, true); - i2c.stop(true); - } - - pub fn read_fulldate(&self) -> Date { - let mut buf: [u8; 7] = [0; 7]; + fn read_register(&self, start: u8, size: usize, buf: &mut [u8]){ let &DS3231(ref i2c) = self; i2c.conf_ack(true); /* enable ack */ i2c.start(true, true); /* start condition (for writing reg addr) */ i2c.send_addr(DS3231_ADDR, TransDir::TRANSMITTER, true); - i2c.send(DS3231_REG_SEC, true); + i2c.send(start, true); /* restart condition (for reading val from the reg addr) */ i2c.start(true, true); i2c.send_addr(DS3231_ADDR, TransDir::RECEIVER, true); - for i in 0..6 { + for i in 0..(size - 1) { buf[i] = i2c.recv(true); } i2c.conf_ack(false); /* disable ack (send nack) */ - buf[6] = i2c.recv(true); + buf[size - 1] = i2c.recv(true); + i2c.stop(true); + } + + fn write_register(&self, start: u8, size: usize, buf: &[u8]) { + let &DS3231(ref i2c) = self; + i2c.conf_ack(true); + i2c.start(true, true); /* start condition for writing */ + i2c.send_addr(DS3231_ADDR, TransDir::TRANSMITTER, true); + i2c.send(start, true); + for i in 0..size { + i2c.send(buf[i], true); + } i2c.stop(true); + } + + pub fn read_fulldate(&self) -> Date { + let mut buf: [u8; 7] = [0; 7]; + self.read_register(DS3231_REG_SEC, 7, &mut buf); let am_enabled = (buf[2] >> 6) & 1 == 1; let hour = if am_enabled { (buf[2] & 0x0f) + ((buf[2] >> 4) & 1) * 10 @@ -79,7 +89,6 @@ impl<'a, 'b> DS3231<'a, 'b> { } pub fn write_fulldate(&self, date: &Date) { - let &DS3231(ref i2c) = self; let hour = if date.am_enabled { (1 << 6) | ((if date.am {0} else {1}) << 5) | ((date.hour / 10) << 4) | (date.hour % 10) @@ -93,13 +102,17 @@ impl<'a, 'b> DS3231<'a, 'b> { DS3231::dec2bcd(date.date), DS3231::dec2bcd(date.month), DS3231::dec2bcd(date.year)]; - i2c.conf_ack(true); - i2c.start(true, true); /* start condition for writing */ - i2c.send_addr(DS3231_ADDR, TransDir::TRANSMITTER, true); - i2c.send(DS3231_REG_SEC, true); - for i in 0..7 { - i2c.send(buf[i], true); - } - i2c.stop(true); + self.write_register(DS3231_REG_SEC, 7, &buf); + } + + pub fn write_control(&self) { + let buf: [u8; 2] = [0; 2]; + self.write_register(DS3231_REG_CTL, 2, &buf); + } + + pub fn read_temperature(&self) -> Temp { + let mut buf: [u8; 2] = [0; 2]; + self.read_register(DS3231_REG_TEMP, 2, &mut buf); + Temp{cels: buf[0] as i8, quarter: buf[1] >> 6} } } |