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[LPC4088] Corrected calculation of CAN clock

pull/481/head
Andreas Rebert 2014-09-10 10:39:09 +02:00
parent 99d14db8c1
commit 4511b5bbc5
1 changed files with 3 additions and 3 deletions
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6
libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC408X/can_api.c
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@ -204,7 +204,7 @@ static const int timing_pts[23][2] = {
{0xF, 0x7}, // 24, 67%
};
static unsigned int can_speed(unsigned int sclk, unsigned int pclk, unsigned int cclk, unsigned char psjw) {
static unsigned int can_speed(unsigned int pclk, unsigned int cclk, unsigned char psjw) {
uint32_t btr;
uint16_t brp = 0;
uint32_t calcbit;
@ -212,7 +212,7 @@ static unsigned int can_speed(unsigned int sclk, unsigned int pclk, unsigned int
int hit = 0;
int bits;
bitwidth = sclk / (pclk * cclk);
bitwidth = (pclk / cclk);
brp = bitwidth / 0x18;
while ((!hit) && (brp < bitwidth / 4)) {
@ -275,7 +275,7 @@ void can_free(can_t *obj) {
int can_frequency(can_t *obj, int f) {
int pclk = PeripheralClock;
int btr = can_speed(SystemCoreClock, pclk, (unsigned int)f, 1);
int btr = can_speed(pclk, (unsigned int)f, 1);
if (btr > 0) {
uint32_t modmask = can_disable(obj);