diff options
| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-05-15 22:00:05 +0000 |
|---|---|---|
| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-05-15 22:00:05 +0000 |
| commit | 39a4006d5a7b40effa3b236dd91e9c6f9a18934a (patch) | |
| tree | 432a44c106133f7800b3ad03be9add96584699a4 /nuttx/arch/arm/src/lm3s/lm3s_lowputc.c | |
| parent | cea1e420e768d287caf7203096d24a14d38014fa (diff) | |
| download | nuttx-39a4006d5a7b40effa3b236dd91e9c6f9a18934a.tar.gz nuttx-39a4006d5a7b40effa3b236dd91e9c6f9a18934a.tar.bz2 nuttx-39a4006d5a7b40effa3b236dd91e9c6f9a18934a.zip | |
LM3S integration
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1784 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/arm/src/lm3s/lm3s_lowputc.c')
| -rw-r--r-- | nuttx/arch/arm/src/lm3s/lm3s_lowputc.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/nuttx/arch/arm/src/lm3s/lm3s_lowputc.c b/nuttx/arch/arm/src/lm3s/lm3s_lowputc.c index 1df228dec..f6d5272ef 100644 --- a/nuttx/arch/arm/src/lm3s/lm3s_lowputc.c +++ b/nuttx/arch/arm/src/lm3s/lm3s_lowputc.c @@ -153,14 +153,14 @@ #define LM3S_REMAINDER (SYSCLK_FREQUENCY - LM3S_BRDDEN * LM3S_BRDI) #define LM3S_DIVFRAC ((LM3S_REMAINDER * 64 + (LM3S_BRDDEN/2)) / LM3S_BRDDEN) -/* For example: LM3S_CONSOLE_BAUD = 115,200, SYSCLK_FREQUENCY = 20,000,000: +/* For example: LM3S_CONSOLE_BAUD = 115,200, SYSCLK_FREQUENCY = 50,000,000: * * LM3S_BRDDEN = (16 * 115,200) = 1,843,200 - * LM3S_BRDI = 20,000,000 / 1,843,200 = 10 - * LM3S_REMAINDER = 20,000,000 - 1,843,200 * 10 = 1,568,000 - * LM3S_DIVFRAC = (1,568,000 * 64 + 921,600) / 1,843,200 = 54 + * LM3S_BRDI = 50,000,000 / 1,843,200 = 27 + * LM3S_REMAINDER = 50,000,000 - 1,843,200 * 27 = 233,600 + * LM3S_DIVFRAC = (233,600 * 64 + 921,600) / 1,843,200 = 8 * - * Which should yied BAUD = 20,000,000 / (16 * (10 + 54/64)) = 115273.8 + * Which should yied BAUD = 50,000,000 / (16 * (27 + 8/64)) = 115207.37 */ /************************************************************************** |