diff options
| author | Keith Packard <keithp@keithp.com> | 2012-06-26 23:11:10 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2012-06-26 23:11:10 -0700 |
| commit | f1ae622eff60e05c1f5d8f822a3cf6a85750c6cc (patch) | |
| tree | 9652e24ae8a4e56a47b463419356da356f7ade7f /src/stm/ao_spi_stm.c | |
| parent | 936ecad62596f34773afb7460b10f63df7d0896d (diff) | |
altos: Optimize FEC encode and decode
Integrate interleaving, CRC and padding within the decode/encode
functions.
Provide for ISR priorities so that the 1120 RX interrupt takes
precedence over the other interrupts or we risk losing bits.
Optimize the viterbi decoder a bit (goes from 10ms per packet to 7ms
per packet).
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/stm/ao_spi_stm.c')
| -rw-r--r-- | src/stm/ao_spi_stm.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/stm/ao_spi_stm.c b/src/stm/ao_spi_stm.c index d3378648..26227086 100644 --- a/src/stm/ao_spi_stm.c +++ b/src/stm/ao_spi_stm.c @@ -23,7 +23,8 @@ struct ao_spi_stm_info { struct stm_spi *stm_spi; }; -uint8_t ao_spi_mutex[STM_NUM_SPI]; +uint8_t ao_spi_mutex[STM_NUM_SPI]; +uint16_t ao_spi_speed[STM_NUM_SPI]; static const struct ao_spi_stm_info ao_spi_stm_info[STM_NUM_SPI] = { { @@ -282,7 +283,7 @@ ao_spi_get(uint8_t spi_index) (1 << STM_SPI_CR1_SSI) | /* ... */ (0 << STM_SPI_CR1_LSBFIRST) | /* Big endian */ (1 << STM_SPI_CR1_SPE) | /* Enable SPI unit */ - (STM_SPI_CR1_BR_PCLK_16 << STM_SPI_CR1_BR) | /* baud rate to pclk/4 */ + (ao_spi_speed[spi_index] << STM_SPI_CR1_BR) | /* baud rate to pclk/4 */ (1 << STM_SPI_CR1_MSTR) | (0 << STM_SPI_CR1_CPOL) | /* Format 0 */ (0 << STM_SPI_CR1_CPHA)); @@ -310,6 +311,7 @@ ao_spi_channel_init(uint8_t spi_index) (0 << STM_SPI_CR2_SSOE) | (0 << STM_SPI_CR2_TXDMAEN) | (0 << STM_SPI_CR2_RXDMAEN)); + ao_spi_speed[spi_index] = AO_SPI_SPEED_FAST; } void |