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-rw-r--r--openpicc/application/tc_cdiv.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/openpicc/application/tc_cdiv.c b/openpicc/application/tc_cdiv.c
index 3bbfe77..d389214 100644
--- a/openpicc/application/tc_cdiv.c
+++ b/openpicc/application/tc_cdiv.c
@@ -39,8 +39,11 @@ void tc_cdiv_set_divider(u_int16_t div)
tcb->TCB_TC0.TC_RA = 1;
tcb->TCB_TC0.TC_RB = 1 + (div >> 1);
- /* Save current CV as phase, then reset to 0 (might otherwise be greater than RC) */
- tc_cdiv_phase_add(tcb->TCB_TC0.TC_RC-(tcb->TCB_TC0.TC_CV%tcb->TCB_TC0.TC_RC));
+ /* We must reset CV to zero when it was greater than RC.
+ * In order to not lose phase information when doing that we'll busy wait till CV is
+ * zero modulo the new RC.*/
+ /*tc_cdiv_phase_add(tcb->TCB_TC0.TC_RC-(tcb->TCB_TC0.TC_CV%tcb->TCB_TC0.TC_RC));*/
+ if(tcb->TCB_TC0.TC_CV > div) while(tcb->TCB_TC0.TC_CV % div != 0);
tcb->TCB_TC0.TC_CCR = AT91C_TC_SWTRG;
}
personal git repositories of Harald Welte. Your mileage may vary