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actually write modified value to register

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This commit is contained in:
ahb 2017-03-09 11:33:09 +01:00
parent f50072bd6b
commit 7835e5bde8
1 changed files with 4 additions and 1 deletions
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5
arch/arm/src/lpc43xx/lpc43_ssp.c
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@ -380,6 +380,7 @@ static void ssp_setmode(FAR struct spi_dev_s *dev, enum spi_mode_e mode)
if (mode != priv->mode)
{
spiinfo("Setting mode to %d.\n", mode);
/* Yes... Set CR0 appropriately */
regval = ssp_getreg(priv, LPC43_SSP_CR0_OFFSET);
@ -442,12 +443,14 @@ static void ssp_setbits(FAR struct spi_dev_s *dev, int nbits)
if (nbits != priv->nbits)
{
spiinfo("Settings bits per word to %d.\n", nbits);
/* Yes... Set CR1 appropriately */
regval = ssp_getreg(priv, LPC43_SSP_CR0_OFFSET);
regval &= ~SSP_CR0_DSS_MASK;
regval |= ((nbits - 1) << SSP_CR0_DSS_SHIFT);
regval = ssp_getreg(priv, LPC43_SSP_CR0_OFFSET);
ssp_putreg(priv, LPC43_SSP_CR0_OFFSET, regval);
spiinfo("SSP Control Register 0 (CR0) after setting DSS: 0x%08X.\n", regval);
/* Save the selection so the subsequence re-configurations will be faster */