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HSRUN drop/raise to allow Ser# read for USB :: Defragster patch 1 #176

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merged 2 commits into from Oct 22, 2016
Merged

HSRUN drop/raise to allow Ser# read for USB :: Defragster patch 1 #176

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fc8222a
Drop HSRUN across Ser# read with interrupts off
Defragster Sep 29, 2016
2facd22
#ifdef version - same code - no runtime check - T_3.6 >120000000 spec…
Defragster Sep 29, 2016
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9 changes: 8 additions & 1 deletion teensy3/usb_desc.c
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Expand Up @@ -1229,12 +1229,19 @@ void usb_init_serialnumber(void)
while (!(FTFL_FSTAT & FTFL_FSTAT_CCIF)) ; // wait
num = *(uint32_t *)&FTFL_FCCOB7;
#elif defined(HAS_KINETIS_FLASH_FTFE)
// TODO: does not work in HSRUN mode
#if F_CPU > 120000000 // Disable HSRUN mode across ser# read
SMC_PMCTRL = SMC_PMCTRL_RUNM(0); // exit HSRUN mode
while (SMC_PMSTAT == SMC_PMSTAT_HSRUN) ; // wait for !(HSRUN)
#endif
FTFL_FSTAT = FTFL_FSTAT_RDCOLERR | FTFL_FSTAT_ACCERR | FTFL_FSTAT_FPVIOL;
*(uint32_t *)&FTFL_FCCOB3 = 0x41070000;
FTFL_FSTAT = FTFL_FSTAT_CCIF;
while (!(FTFL_FSTAT & FTFL_FSTAT_CCIF)) ; // wait
num = *(uint32_t *)&FTFL_FCCOBB;
#if F_CPU > 120000000
SMC_PMCTRL = SMC_PMCTRL_RUNM(3); // enter HSRUN mode
while (SMC_PMSTAT != SMC_PMSTAT_HSRUN) ; // wait for HSRUN
#endif
#endif
__enable_irq();
// add extra zero to work around OS-X CDC-ACM driver bug
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