JTAG Boundary-Scan Examples for OpenOCD

STM32F1-blink-PC13.svf

// JTAG Boundary-Scan command sequence to blink LED connected to PC13
// Supports STM32F103x8 and STM32F103xB
// See STM32F1_Med_density_LQFP48.bsd
//
// Invoke it like this:
// openocd -f interface/usb-jtag.cfg -f target/stm32f1x.cfg -c "init; svf -tap stm32f1x.bs test3.svf quiet" -c exit

SIR 5 TDI (01); // IDCODE
SDR 32 TDI(00000000) TDO (06410041) MASK (0fffffff) ;
SIR 5 TDI (02); // SAMPLE/PRELOAD
SDR 232 TDI (fffE7fffffffffffffffffffffffffffffffffffffffffffffffffffff);
SIR 5 TDI (00); // EXTEST
RUNTEST 500000 TCK;
SDR 232 TDI (fffEFfffffffffffffffffffffffffffffffffffffffffffffffffffff);
RUNTEST 500000 TCK;
SDR 232 TDI (fffE7fffffffffffffffffffffffffffffffffffffffffffffffffffff);
RUNTEST 500000 TCK;
SDR 232 TDI (fffEFfffffffffffffffffffffffffffffffffffffffffffffffffffff);
RUNTEST 500000 TCK;
SDR 232 TDI (fffE7fffffffffffffffffffffffffffffffffffffffffffffffffffff);
RUNTEST 500000 TCK;
SDR 232 TDI (fffFFfffffffffffffffffffffffffffffffffffffffffffffffffffff);
SIR 5 TDI (1F); // BYPASS

STM32F1-blink-PC13.tcl

# OpenOCD script to blink LED connected to PC13
# Supports STM32F103x8 and STM32F103xB
# See STM32F1_Med_density_LQFP48.bsd
#
# Invoke it like this:
# openocd -f interface/usb-jtag.cfg -f STM32F1-blink-PC13.tcl

jtag newtap stm32f1x cpu -irlen 4 -expected-id 0x3ba00477
jtag newtap stm32f1x bs -irlen 5 -expected-id 0x06410041 -expected-id 0x16410041

init

# IDCODE
irscan stm32f1x.bs 1
if ![string match ?6410041 [drscan stm32f1x.bs 32 0x00000000]] {
    error "Unexpected IDCODE"
}

# SAMPLE/PRELOAD
irscan stm32f1x.bs 2
drscan stm32f1x.bs 232 0xfffFFfffffffffffffffffffffffffffffffffffffffffffffffffffff

# EXTEST
irscan stm32f1x.bs 0
while true {
    drscan stm32f1x.bs 232 0xfffE7fffffffffffffffffffffffffffffffffffffffffffffffffffff
    sleep 500
    drscan stm32f1x.bs 232 0xfffEFfffffffffffffffffffffffffffffffffffffffffffffffffffff
    sleep 500
}

STM32F1-PB2-to-PC13.tcl

# OpenOCD script to demonstrate JTAG Boundary-Scan I/O
# It will update the state of LED connected to PC13 according to input level on PB2/BOOT1.
# Supports STM32F103x8 and STM32F103xB
# See STM32F1_Med_density_LQFP48.bsd
#
# Invoke it like this:
# openocd -f interface/usb-jtag.cfg -f STM32F1-PB2-to-PC13.tcl

jtag newtap stm32f1x cpu -irlen 4 -expected-id 0x3ba00477
jtag newtap stm32f1x bs -irlen 5 -expected-id 0x06410041 -expected-id 0x16410041

init

# IDCODE
irscan stm32f1x.bs 1
if ![string match ?6410041 [drscan stm32f1x.bs 32 0x00000000]] {
    error "Unexpected IDCODE"
}

# SAMPLE/PRELOAD
irscan stm32f1x.bs 2
set sample [drscan stm32f1x.bs 232 0xfffFFfffffffffffffffffffffffffffffffffffffffffffffffffffff]

# EXTEST
irscan stm32f1x.bs 0
while true {
    set pb2 [expr (0x[string range $sample 20 21] & 128) ? 1 : 0]
    if $pb2 {
        set send_data 0xfffE7fffffffffffffffffffffffffffffffffffffffffffffffffffff
    } else {
        set send_data 0xfffEFfffffffffffffffffffffffffffffffffffffffffffffffffffff
    }
    drscan stm32f1x.bs 232 $send_data
    sleep 100
    set sample [drscan stm32f1x.bs 232 $send_data]
}