stm32f4 spi; match GPIO IO speed setting to SPI baudrate.
Project: http://git-wip-us.apache.org/repos/asf/incubator-mynewt-core/repo Commit: http://git-wip-us.apache.org/repos/asf/incubator-mynewt-core/commit/4b468ce3 Tree: http://git-wip-us.apache.org/repos/asf/incubator-mynewt-core/tree/4b468ce3 Diff: http://git-wip-us.apache.org/repos/asf/incubator-mynewt-core/diff/4b468ce3 Branch: refs/heads/develop Commit: 4b468ce31c5874335e2a0b056032f3a5fdf71504 Parents: eeb5ac0 Author: Marko Kiiskila <ma...@runtime.io> Authored: Mon Oct 17 15:51:57 2016 -0700 Committer: Marko Kiiskila <ma...@runtime.io> Committed: Mon Oct 17 23:15:07 2016 -0700 ---------------------------------------------------------------------- hw/mcu/stm/stm32f4xx/src/hal_spi.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/incubator-mynewt-core/blob/4b468ce3/hw/mcu/stm/stm32f4xx/src/hal_spi.c ---------------------------------------------------------------------- diff --git a/hw/mcu/stm/stm32f4xx/src/hal_spi.c b/hw/mcu/stm/stm32f4xx/src/hal_spi.c index 5033c42..2d968e1 100644 --- a/hw/mcu/stm/stm32f4xx/src/hal_spi.c +++ b/hw/mcu/stm/stm32f4xx/src/hal_spi.c @@ -488,7 +488,13 @@ hal_spi_config(int spi_num, struct hal_spi_settings *settings) gpio.Mode = GPIO_MODE_AF_PP; gpio.Pull = GPIO_NOPULL; - gpio.Speed = GPIO_SPEED_FREQ_VERY_HIGH; + if (settings->baudrate <= 2000) { + gpio.Speed = GPIO_SPEED_FREQ_LOW; + } else if (settings->baudrate <= 12500) { + gpio.Speed = GPIO_SPEED_FREQ_MEDIUM; + } else { + gpio.Speed = GPIO_SPEED_FREQ_HIGH; + } /* Enable the clocks for this SPI */ switch (spi_num) { @@ -665,7 +671,7 @@ hal_spi_txrx_noblock(int spi_num, void *txbuf, void *rxbuf, int len) spi->handle.pTxBuffPtr = txbuf; spi->handle.TxXferSize = len; spi->handle.pRxBuffPtr = rxbuf; - spi->handle.RxXferSize = len; + spi->handle.RxXferSize = len; } } __HAL_ENABLE_INTERRUPTS(sr);
