diff options
| author | Reimu NotMoe <[email protected]> | 2024-12-27 00:57:22 +0800 |
|---|---|---|
| committer | Reimu NotMoe <[email protected]> | 2024-12-27 00:57:22 +0800 |
| commit | f409472998cfba4f6be0534912c1afd48e0d6816 (patch) | |
| tree | 11070e2eda954b77451c9701dbdf78e80c6cc212 /src | |
| parent | 8907a817a2a782423bf8d6db2136147b6e334225 (diff) | |
dcd_pic: handle remote wakeup more correctly
Diffstat (limited to 'src')
| -rw-r--r-- | src/portable/microchip/pic/dcd_pic.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/portable/microchip/pic/dcd_pic.c b/src/portable/microchip/pic/dcd_pic.c index 0dac18523..9ffeb0811 100644 --- a/src/portable/microchip/pic/dcd_pic.c +++ b/src/portable/microchip/pic/dcd_pic.c @@ -532,8 +532,25 @@ void dcd_remote_wakeup(uint8_t rhport) #else U1CONbits.RESUME = 1; #endif - unsigned cnt = 25000000 / 1000; + + // FIXME: Assert RESUME signal correctly, requires device-specific handling + // For now we use a hardcoded cycle-based delay which attempts to delay 10ms + // at the most common CPU frequencies. On PIC32s we assume the loop body + // takes 3 cycles. On 16-bit PICs we assume the XC16 compiler is in use and + // use its `__delay_ms' function. + +#if CFG_TUSB_MCU == OPT_MCU_PIC32MM + uint32_t cnt = 24000000 / 1000 / 3; + while (cnt--) asm volatile("nop"); +#elif CFG_TUSB_MCU == OPT_MCU_PIC32MX + uint32_t cnt = 40000000 / 1000 / 3; while (cnt--) asm volatile("nop"); +#elif CFG_TUSB_MCU == OPT_MCU_PIC32MK + uint32_t cnt = 120000000 / 1000 / 3; + while (cnt--) asm volatile("nop"); +#else + __delay_ms(10); +#endif #if TU_PIC_INT_SIZE == 4 U1CONCLR = _U1CON_RESUME_MASK; |