diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/serprog-protocol.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/serprog-protocol.txt b/Documentation/serprog-protocol.txt index a3a4863..d8733cc 100644 --- a/Documentation/serprog-protocol.txt +++ b/Documentation/serprog-protocol.txt @@ -33,6 +33,7 @@ COMMAND Description Parameters Return Value 0x12 Set used bustype 8-bit flags (as with 0x05) ACK / NAK 0x13 Perform SPI operation 24-bit slen + 24-bit rlen ACK + rlen bytes of data / NAK + slen bytes of data +0x14 Set SPI clock frequency in Hz 32-bit requested frequency ACK + 32-bit set frequency / NAK 0x?? unimplemented command - invalid. @@ -73,6 +74,14 @@ Additional information of the above commands: Maximum slen is Q_WRNMAXLEN in case Q_BUSTYPE returns SPI only or S_BUSTYPE was used to set SPI exclusively before. Same for rlen and Q_RDNMAXLEN. This operation is immediate, meaning it doesnt use the operation buffer. + 0x14 (S_SPI_FREQ): + Set the SPI clock frequency. The 32-bit value indicates the + requested frequency in Hertz. Value 0 is reserved and should + be NAKed by the programmer. The requested frequency should be + mapped by the programmer software to a supported frequency + lower than the one requested. If there is no lower frequency + available the lowest possible should be used. The value + chosen is sent back in the reply with an ACK. About mandatory commands: The only truly mandatory commands for any device are 0x00, 0x01, 0x02 and 0x10, but one can't really do anything with these commands. @@ -107,3 +116,4 @@ This define listing should help C coders - (it's here to be the single source fo #define S_CMD_Q_RDNMAXLEN 0x11 /* Query read-n maximum length */ #define S_CMD_S_BUSTYPE 0x12 /* Set used bustype(s). */ #define S_CMD_O_SPIOP 0x13 /* Perform SPI operation. */ +#define S_CMD_S_SPI_FREQ 0x14 /* Set SPI clock frequency */ |
