diff options
| author | Christian Mauderer <christian.mauderer@embedded-brains.de> | 2020-02-10 10:35:15 +0100 |
|---|---|---|
| committer | Christian Mauderer <christian.mauderer@embedded-brains.de> | 2020-02-11 09:17:02 +0100 |
| commit | d00d690557a1e31dd7f0ac371974796df5a43c3f (patch) | |
| tree | d0f4ce1df4690fd2d39d15603db1bdd3741e41a4 | |
| parent | 9c7bffb5415313acb87224048c42bb18614bb532 (diff) | |
bsp/imx: Allow gapless SPI transfers.
This uses the tx-threshold to reduce gaps in SPI transmissions.
Update #3869.
| -rw-r--r-- | bsps/arm/imx/spi/imx-ecspi.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/bsps/arm/imx/spi/imx-ecspi.c b/bsps/arm/imx/spi/imx-ecspi.c index 9a232c53e9..4c4978cdac 100644 --- a/bsps/arm/imx/spi/imx-ecspi.c +++ b/bsps/arm/imx/spi/imx-ecspi.c @@ -174,12 +174,14 @@ static void imx_ecspi_config( uint32_t conreg; uint32_t testreg; uint32_t configreg; + uint32_t dmareg; uint32_t cs_bit; conreg = IMX_ECSPI_CONREG_CHANNEL_MODE(0xf) | IMX_ECSPI_CONREG_SMC | IMX_ECSPI_CONREG_EN; testreg = regs->testreg; configreg = regs->configreg; + dmareg = regs->dmareg; cs_bit = 1U << cs; conreg |= imx_ecspi_conreg_divider(bus, speed_hz); @@ -213,8 +215,11 @@ static void imx_ecspi_config( testreg &= ~IMX_ECSPI_TESTREG_LBC; } + dmareg = IMX_ECSPI_DMAREG_TX_THRESHOLD_SET(dmareg, IMX_ECSPI_FIFO_SIZE/2); + regs->conreg = conreg; regs->testreg = testreg; + regs->dmareg = dmareg; regs->configreg = configreg; bus->conreg = conreg; @@ -287,7 +292,7 @@ static void imx_ecspi_next_msg(imx_ecspi_bus *bus, volatile imx_ecspi *regs) bus->tx_buf = msg->tx_buf; imx_ecspi_set_push_pop(bus, msg->len, msg->bits_per_word); imx_ecspi_push(bus, regs); - regs->intreg = IMX_ECSPI_TE; + regs->intreg = IMX_ECSPI_TE | IMX_ECSPI_TDR; } else { regs->intreg = 0; imx_ecspi_done(bus); |