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Fix some naming

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This commit is contained in:
Gregory Nutt 2014-10-20 12:29:28 -06:00
parent 26acd8d067
commit f754a51d15
1 changed files with 9 additions and 9 deletions
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18
arch/arm/src/efm32/efm32_lowputc.c
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@ -110,7 +110,7 @@
static void efm32_setbaud(uintptr_t base, uint32_t baud) static void efm32_setbaud(uintptr_t base, uint32_t baud)
{ {
uint64_t clkdiv; uint64_t clkdiv;
uint64_t minover; uint64_t maxover;
uint32_t oversample; uint32_t oversample;
uint32_t regval; uint32_t regval;
uint32_t ovs; uint32_t ovs;
@ -134,36 +134,36 @@ static void efm32_setbaud(uintptr_t base, uint32_t baud)
* *
* Suppose we insist on a CLKDIV >= 24, then: * Suppose we insist on a CLKDIV >= 24, then:
* *
* MINoversample = 256 * fHFPERCLK / (280 * baud)) * MAXoversample = 256 * fHFPERCLK / (280 * baud))
* *
* Example: fHPERCLK = 32MHz, baud=115200 * Example: fHPERCLK = 32MHz, baud=115200
* MINoversample = 254.0 -> 16 * MAXoversample = 254.0 -> 16
* CLKDIV = 4445.4 * CLKDIV = 4445.4
* baud = 115,249.3 * baud = 115,249.3
*/ */
minover = ((BOARD_HFPERCLK_FREQUENCY << 8) / 280) / baud; maxover = ((BOARD_HFPERCLK_FREQUENCY << 8) / 280) / baud;
if (minover >= 16) if (maxover >= 16)
{ {
DEBUGASSERT(baud <= (BOARD_HFPERCLK_FREQUENCY / 16)); DEBUGASSERT(baud <= (BOARD_HFPERCLK_FREQUENCY / 16));
oversample = 16; oversample = 16;
ovs = USART_CTRL_OVS_X16; ovs = USART_CTRL_OVS_X16;
} }
else if (minover >= 8) else if (maxover >= 8)
{ {
DEBUGASSERT(baud <= (BOARD_HFPERCLK_FREQUENCY / 8)); DEBUGASSERT(baud <= (BOARD_HFPERCLK_FREQUENCY / 8));
oversample = 8; oversample = 8;
ovs = USART_CTRL_OVS_X8; ovs = USART_CTRL_OVS_X8;
} }
else if (minover >= 6) else if (maxover >= 6)
{ {
DEBUGASSERT(baud <= (BOARD_HFPERCLK_FREQUENCY / 6)); DEBUGASSERT(baud <= (BOARD_HFPERCLK_FREQUENCY / 6));
oversample = 6; oversample = 6;
ovs = USART_CTRL_OVS_X6; ovs = USART_CTRL_OVS_X6;
} }
else /* if (minover >= 4) */ else /* if (maxover >= 4) */
{ {
DEBUGASSERT(minover >= 4 && baud <= (BOARD_HFPERCLK_FREQUENCY / 4)); DEBUGASSERT(maxover >= 4 && baud <= (BOARD_HFPERCLK_FREQUENCY / 4));
oversample = 4; oversample = 4;
ovs = USART_CTRL_OVS_X4; ovs = USART_CTRL_OVS_X4;
} }