pyOCD user script to erase sector0 of flash memory for RA4M1 / R7FA4M1AB

ra-util.py

# pyocd cmd --script ra-util.py -c "erase_sector0"

from pyocd.core.exceptions import TransferFaultError, TransferTimeoutError

if not "target_override" in options:
    options.set("target_override", "cortex_m")
    # options.set("target_override", "R7FA4M1AB")

if not "frequency" in options:
    options.set("frequency", 12500000)

class Context:
    pass

self = Context()

def read8(off):
    return target.read8(off)

def read16(off):
    return target.read16(off)

def read32(off):
    return target.read32(off)

def write8(off, dat):
    target.write8(off, dat)

def write16(off, dat):
    target.write16(off, dat)

def write32(off, dat):
    target.write32(off, dat)

@command(help="Test Flash Memory")
def erase_sector0():

    # PRCR
    write16(0x4001_E3FE, 0xA503)

    sckscr = read8(0x4001_E026)
    print(f"SCKSCR = 0x{sckscr:02X}")
    write8(0x4001_E026, 0x01)
    sckscr = read8(0x4001_E026)
    print(f"SCKSCR = 0x{sckscr:02X}")

    opccr = read8(0x4001_E0A0)
    print(f"OPCCR = 0x{opccr:02X}")
    write8(0x4001_E0A0, 0x01)
    opccr = read8(0x4001_E0A0)
    print(f"OPCCR = 0x{opccr:02X}")

    sckdivcr = read32(0x4001_E020)
    print(f"SCKDIVCR = 0x{sckdivcr:08X}")
    write32(0x4001_E020, 0x0000_0000)
    sckdivcr = read32(0x4001_E020)
    print(f"SCKDIVCR = 0x{sckdivcr:08X}")

    # FENTRYR
    write16(0x407E_FFB2, 0xAA01);

    # FPR.write(0xA5);
    write8(0x407E_C180, 0xA5)
    # FPMCR.write(0x12);
    write8(0x407E_C100, 0x12)
    # FPMCR.write(!0x12);
    write8(0x407E_C100, ~0x12)
    # FPMCR.write(0x12);
    write8(0x407E_C100, 0x12)

    # wait tDIS = 2 us, done roughly
    # self.delay.delay_us(2);
    # FPR.write(0xA5);
    write8(0x407E_C180, 0xA5)
    # FPMCR.write(0x92);
    write8(0x407E_C100, 0x92)
    # FPMCR.write(!0x92);
    write8(0x407E_C100, ~0x92)
    # FPMCR.write(0x92);
    write8(0x407E_C100, 0x92)

    # wait tMS = 5 us for High-speed and 720ns for Middle-speed, done roughly
    # self.delay.delay_us(5);
    # FPR.write(0xA5);
    write8(0x407E_C180, 0xA5)
    # FPMCR.write(0x82);
    write8(0x407E_C100, 0x82)
    # FPMCR.write(!0x82);
    write8(0x407E_C100, ~0x82)
    # FPMCR.write(0x82);
    write8(0x407E_C100, 0x82)

    fpmcr = read8(0x407E_C100)
    print(f"FPMCR = 0x{fpmcr:02X}")

    # Set PCKA to 3 when FCLK is at 4MHz
    # FISR.write(4 - 1);
    # Set PCKA to 7 when FCLK is at 8MHz
    # FISR.write(8 - 1);
    write8(0x407E_C1D8, 8 - 1)

    # FRESETR.write(1);
    # FRESETR.write(0);
    write8(0x407E_C124, 1)
    write8(0x407E_C124, 0)

    # let addr = 0x0000_0000
    # FSARH.write((addr >> 16) as u16);
    write16(0x407E_C110, 0)
    # FSARL.write(addr as u16);
    write16(0x407E_C108, 0)

    # let end_addr = addr + 0x800;
    # FEARH.write((end_addr >> 16) as u16);
    write16(0x407E_C120, 0)
    # FEARL.write(end_addr as u16);
    write16(0x407E_C118, 0x7FF)

    # FCR.write(0x84); // Block Erase Command
    write8(0x407E_C114, 0x84)
    # while (FSTATR1.read() & 0x40) == 0 { } // Wait until FRDY = 1
    while (read8(0x407E_C12C) & 0x40) == 0:
        pass
    # FCR.write(0x00);
    write8(0x407E_C114, 0x00)
    # while (FSTATR1.read() & 0x40) != 0 { } // Wait while FRDY = 1
    while (read8(0x407E_C12C) & 0x40) != 0:
        pass

    # rprintln!("FSTATR2 = 0x{:X}", FSTATR2.read());
    fstatr2 = read8(0x407E_C1F0)
    print(f"FSTATR2 = 0x{fstatr2:02X}")

    # Switch backto read-mode
    # FPR.write(0xA5);
    write8(0x407E_C180, 0xA5)
    # FPMCR.write(0x92);
    write8(0x407E_C100, 0x92)
    # FPMCR.write(!0x92);
    write8(0x407E_C100, ~0x92)
    # FPMCR.write(0x92);
    write8(0x407E_C100, 0x92)

    # wait tUndefined, done roughly
    # self.delay.delay_us(1);
    # FPR.write(0xA5);
    write8(0x407E_C180, 0xA5)
    # FPMCR.write(0x12);
    write8(0x407E_C100, 0x12)
    # FPMCR.write(!0x12);
    write8(0x407E_C100, ~0x12)
    # FPMCR.write(0x12);
    write8(0x407E_C100, 0x12)

    # wait tMS = 5 us for High-speed and 720ns for Middle-speed, done roughly
    # self.delay.delay_us(5);
    # FPR.write(0xA5);
    write8(0x407E_C180, 0xA5)
    # FPMCR.write(0x08);
    write8(0x407E_C100, 0x08)
    # FPMCR.write(!0x08);
    write8(0x407E_C100, ~0x08)
    # FPMCR.write(0x08);
    write8(0x407E_C100, 0x08)

    # FENTRYR.write(0xAA00);
    write16(0x407E_FFB2, 0xAA00);

    target.reset()