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| author | Bertrik Sikken <bertrik@sikken.nl> | 2009-05-21 18:31:50 +0000 |
|---|---|---|
| committer | Bertrik Sikken <bertrik@sikken.nl> | 2009-05-21 18:31:50 +0000 |
| commit | 4a4639e157762bacfe84a99a91feabf282b5546f (patch) | |
| tree | 45be6c581efdc8e3bae916d8d3a69f1e54607085 | |
| parent | 442726339ab0a424edf0e3406c68faacb425d9a2 (diff) | |
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Update as3525 i2c register description
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21018 a1c6a512-1295-4272-9138-f99709370657
| -rw-r--r-- | firmware/target/arm/as3525/ascodec-as3525.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/firmware/target/arm/as3525/ascodec-as3525.c b/firmware/target/arm/as3525/ascodec-as3525.c index 43a982f..b979021 100644 --- a/firmware/target/arm/as3525/ascodec-as3525.c +++ b/firmware/target/arm/as3525/ascodec-as3525.c @@ -27,7 +27,14 @@ I2C register description: * I2C2_CNTRL needs to be set to 0x51 for transfers to work at all. - bit 1 indicates direction of transfer (0 = write, 1 = read) + bit 0: ? possibly related to using ACKs during transfers + bit 1: direction of transfer (0 = write, 1 = read) + bit 2: use 2-byte slave address + * I2C2_IMR, I2C2_RIS, I2C2_MIS, I2C2_INT_CLR interrupt bits: + bit 2: byte read interrupt + bit 3: byte write interrupt + bit 4: ? possibly some kind of error status + bit 7: ACK error * I2C2_SR (status register) indicates in bit 0 if a transfer is busy. * I2C2_SLAD0 contains the i2c slave address to read from / write to. * I2C2_CPSR0/1 is the divider from the peripheral clock to the i2c clock. |