From 741ea23efef4f73ebaf5177f2bf02ffd08158ba8 Mon Sep 17 00:00:00 2001 From: Andrey Miroshnikov Date: Tue, 22 Feb 2022 23:58:37 +0000 Subject: [PATCH] Added rd/wr methods to GPIO manager --- src/spec/simple_gpio.py | 226 +++++++++++++++++++++++++--------------- 1 file changed, 140 insertions(+), 86 deletions(-) diff --git a/src/spec/simple_gpio.py b/src/spec/simple_gpio.py index 75826c7..2e0d31b 100644 --- a/src/spec/simple_gpio.py +++ b/src/spec/simple_gpio.py @@ -175,24 +175,40 @@ def test_gpio_single(dut, gpio, use_random=True): # Shadow reg container class class GPIOConfigReg(): - def __init__(self): + def __init__(self, shift_dict): + self.shift_dict = shift_dict self.oe=0 self.ie=0 self.puen=0 self.pden=0 self.io=0 self.bank=0 + self.packed=0 - def set(self, oe=0, ie=0, puen=0, pden=0, outval=0, bank=0): + def set(self, oe=0, ie=0, puen=0, pden=0, io=0, bank=0): self.oe=oe self.ie=ie self.puen=puen self.pden=pden - self.io=outval + self.io=io self.bank=bank + self.pack() # Produce packed byte for sending def set_out(self, outval): self.io=outval + self.pack() # Produce packed byte for sending + + # Take config parameters of specified GPIOs, and combine them to produce + # bytes for sending via WB bus + def pack(self): + self.packed = ((self.oe << self.shift_dict['oe']) + | (self.ie << self.shift_dict['ie']) + | (self.puen << self.shift_dict['puen']) + | (self.pden << self.shift_dict['pden']) + | (self.io << self.shift_dict['io']) + | (self.bank << self.shift_dict['bank'])) + + #print("GPIO Packed CSR: {0:x}".format(self.packed)) # Object for storing each gpio's config state @@ -211,7 +227,15 @@ class GPIOManager(): self.n_rows = ceil(self.n_gpios / self.wordsize) self.shadow_csr = [] for i in range(self.n_gpios): - self.shadow_csr.append(GPIOConfigReg()) + self.shadow_csr.append(GPIOConfigReg(self.shift_dict)) + + def print_info(self): + print("----------") + print("GPIO Block Info:") + print("Number of GPIOs: {}".format(self.n_gpios)) + print("WB Data bus width (in bytes): {}".format(self.wordsize)) + print("Number of rows: {}".format(self.n_rows)) + print("----------") # The shifting of control bits in the configuration word is dependent on the # defined layout. To prevent maintaining the shift constants in a separate @@ -244,81 +268,81 @@ class GPIOManager(): if start >= self.n_gpios: raise Exception("GPIO must be less/equal to last GPIO.") end = start + 1 - print("Setting config for GPIOs {0} until {1}".format(start, end)) + print("Parsed GPIOs {0} until {1}".format(start, end)) return start, end - # Take config parameters of specified GPIOs, and combine them to produce - # bytes for sending via WB bus - def _pack_csr(self, start, end): - #start, end = self._parse_gpio_arg(gpio_str) - num_csr = end-start - csr = [0] * num_csr - for i in range(0, num_csr): - gpio = i + start - print("Pack: gpio{}".format(gpio)) - csr[i] = ((self.shadow_csr[gpio].oe << self.shift_dict['oe']) - | (self.shadow_csr[gpio].ie << self.shift_dict['ie']) - | (self.shadow_csr[gpio].puen << self.shift_dict['puen']) - | (self.shadow_csr[gpio].pden << self.shift_dict['pden']) - | (self.shadow_csr[gpio].io << self.shift_dict['io']) - | (self.shadow_csr[gpio].bank << self.shift_dict['bank'])) - - print("GPIO{0} Packed CSR: {1:x}".format(gpio, csr[i])) - - return csr # return the config byte list + # Take a combined word and update shadow reg's + # TODO: convert hard-coded sizes to use the csrbus_layout (or dict?) + def update_single_shadow(self, csr_byte, gpio): + oe = (csr_byte >> self.shift_dict['oe']) & 0x1 + ie = (csr_byte >> self.shift_dict['ie']) & 0x1 + puen = (csr_byte >> self.shift_dict['puen']) & 0x1 + pden = (csr_byte >> self.shift_dict['pden']) & 0x1 + io = (csr_byte >> self.shift_dict['io']) & 0x1 + bank = (csr_byte >> self.shift_dict['bank']) & 0x3 + + print("csr={0:x} | oe={1}, ie={2}, puen={3}, pden={4}, io={5}, bank={6}" + .format(csr_byte, oe, ie, puen, pden, io, bank)) + + self.shadow_csr[gpio].set(oe, ie, puen, pden, io, bank) + return oe, ie, puen, pden, io, bank def rd_csr(self, row_start): row_word = yield from wb_read(self.dut.bus, row_start) print("Returned CSR: {0:x}".format(row_word)) return row_word - def rd_input(self, row_start): - in_val = yield from wb_read(dut.bus, gpio) - in_val = (in_val >> IOSHIFT) & 1 - print("GPIO{0} | Input: {1:b}".format(gpio, in_val)) - return in_val + # Update a single row of configuration registers + def wr_row(self, row_addr, check=False): + curr_gpio = row_addr * self.wordsize + config_word = 0 + for byte in range(0, self.wordsize): + if curr_gpio > self.n_gpios: + break + config_word += self.shadow_csr[curr_gpio].packed << (8 * byte) + #print("Reading GPIO{} shadow reg".format(curr_gpio)) + curr_gpio += 1 + print("Writing shadow CSRs val {0:x} to row addr {1:x}" + .format(config_word, row_addr)) + yield from wb_write(self.dut.bus, row_addr, config_word) + yield # Allow one clk cycle to propagate - def print_info(self): - print("----------") - print("GPIO Block Info:") - print("Number of GPIOs: {}".format(self.n_gpios)) - print("WB Data bus width (in bytes): {}".format(self.wordsize)) - print("Number of rows: {}".format(self.n_rows)) - print("----------") + if(check): + read_word = yield from self.rd_row(row_addr) + assert config_word == read_word + + # Read a single address row of GPIO CSRs, and update shadow + def rd_row(self, row_addr): + read_word = yield from self.rd_csr(row_addr) + curr_gpio = row_addr * self.wordsize + single_csr = 0 + for byte in range(0, self.wordsize): + if curr_gpio > self.n_gpios: + break + single_csr = (read_word >> (8 * byte)) & 0xFF + #print("Updating GPIO{0} shadow reg to {1:x}" + # .format(curr_gpio, single_csr)) + self.update_single_shadow(single_csr, curr_gpio) + curr_gpio += 1 + return read_word # Write all shadow registers to GPIO block - def wr_all(self): - # UPDATE using ALL shadow registers - csr = self._pack_csr(0, self.n_gpios) - #start_addr = floor(start / self.wordsize) - start_addr = 0 - curr_gpio = 0 + def wr_all(self, check=False): for row in range(0, self.n_rows): - row_word = 0 - start_byte = curr_gpio % self.wordsize - for byte in range(start_byte, self.wordsize): - if curr_gpio > self.n_gpios: - break - #row_word += csr[byte] << (8 * byte) - row_word += csr[curr_gpio] << (8 * byte) - curr_gpio += 1 - print("Configuring CSR to {0:x} to addr: {1:x}" - .format(row_word, start_addr+row)) - yield from wb_write(self.dut.bus, start_addr+row, row_word) - yield # Allow one clk cycle to propagate - - if(True): #check): - test_row = yield from self.rd_csr(start_addr+row) - assert row_word == test_row + yield from self.wr_row(row, check) + # Read all GPIO block row addresses and update shadow reg's + def rd_all(self, check=False): + for row in range(0, self.n_rows): + yield from self.rd_row(row, check) def config(self, gpio_str, oe, ie, puen, pden, outval, bank, check=False): start, end = self._parse_gpio_arg(gpio_str) # Update the shadow configuration for gpio in range(start, end): - print(oe, ie, puen, pden, outval, bank) + # print(oe, ie, puen, pden, outval, bank) self.shadow_csr[gpio].set(oe, ie, puen, pden, outval, bank) - + # TODO: only update the required rows? yield from self.wr_all() # Set/Clear the output bit for single or group of GPIOs @@ -334,29 +358,52 @@ class GPIOManager(): .format(start, end-1, outval)) yield from self.wr_all() - """ - # Not used normally - only for debug - def reg_write(dut, gpio, reg_val): - print("Configuring CSR to {0:x}".format(reg_val)) - yield from wb_write(dut.bus, gpio, reg_val) + + def rd_input(self, gpio_str): # REWORK + start, end = self._parse_gpio_arg(gpio_str) + curr_gpio = 0 + # Too difficult to think about, just read all configs + #start_row = floor(start / self.wordsize) + # Hack because end corresponds to range limit, but maybe on same row + # TODO: clean + #end_row = floor( (end-1) / self.wordsize) + 1 + read_data = [0] * self.n_rows + for row in range(0, self.n_rows): + read_data[row] = yield from self.rd_row(row) + + num_to_read = (end - start) + read_in = [0] * num_to_read + curr_gpio = 0 + for i in range(0, num_to_read): + read_in[i] = self.shadow_csr[curr_gpio].io + curr_gpio += 1 + + print("GPIOs {0} until {1}, i={2}".format(start, end, read_in)) + return read_in # TODO: There's probably a cleaner way to clear the bit... - def gpio_set_in_pad(dut, gpio, in_val): - old_in_val = yield dut.gpio_i - if in_val: - new_in_val = old_in_val | (in_val << gpio) - else: - temp = (old_in_val >> gpio) & 1 - if temp: - mask = ~(1 << gpio) - new_in_val = old_in_val & mask - else: - new_in_val = old_in_val - print("Previous GPIO i: {0:b} | New GPIO i: {1:b}" - .format(old_in_val, new_in_val)) - yield dut.gpio_i.eq(new_in_val) - yield # Allow one clk cycle to propagate - """ + def sim_set_in_pad(self, gpio_str, in_val): + start, end = self._parse_gpio_arg(gpio_str) + for gpio in range(start, end): + old_in_val = yield self.dut.gpio_ports[gpio].i + print(old_in_val) + print("GPIO{0} Previous i: {1:b} | New i: {2:b}" + .format(gpio, old_in_val, in_val)) + yield self.dut.gpio_ports[gpio].i.eq(in_val) + yield # Allow one clk cycle to propagate + + def rd_shadow(self): + shadow_csr = [0] * self.n_gpios + for gpio in range(0, self.n_gpios): + shadow_csr[gpio] = self.shadow_csr[gpio].packed + + hex_str = "" + for reg in shadow_csr: + hex_str += " "+hex(reg) + print("Shadow reg's: ", hex_str) + + return shadow_csr + def sim_gpio(dut, use_random=True): #print(dut) @@ -443,18 +490,18 @@ def gen_gtkw_doc(n_gpios, wordsize, filename): single_gpio.append(gpio_signals) traces.append(tuple(single_gpio)) - print(traces) + #print(traces) write_gtkw(filename+".gtkw", filename+".vcd", traces, style, module="top.xics_icp") def test_gpio(): - filename = "test_gpio" + filename = "test_gpio" # Doesn't include extension n_gpios = 8 wordsize = 4 # Number of bytes in the WB data word dut = SimpleGPIO(wordsize, n_gpios) vl = rtlil.convert(dut, ports=dut.ports()) - with open("test_gpio.il", "w") as f: + with open(filename+".il", "w") as f: f.write(vl) m = Module() @@ -465,18 +512,19 @@ def test_gpio(): #sim.add_sync_process(wrap(sim_gpio(dut, use_random=False))) sim.add_sync_process(wrap(test_gpioman(dut))) - sim_writer = sim.write_vcd('test_gpio.vcd') + sim_writer = sim.write_vcd(filename+".vcd") with sim_writer: sim.run() gen_gtkw_doc(n_gpios, wordsize, filename) def test_gpioman(dut): + print("------START----------------------") gpios = GPIOManager(dut, csrbus_layout) gpios.print_info() #gpios._parse_gpio_arg("all") #gpios._parse_gpio_arg("0") - #gpios._parse_gpio_arg("1-3") + gpios._parse_gpio_arg("1-3") #gpios._parse_gpio_arg("20") oe = 1 @@ -490,6 +538,12 @@ def test_gpioman(dut): yield from gpios.config("4-7", oe=0, ie=1, puen=0, pden=1, outval=0, bank=2) yield from gpios.set_out("0-3", outval=1) + #yield from gpios.rd_all() + yield from gpios.sim_set_in_pad("4-7", 1) + print("----------------------------") + yield from gpios.rd_input("4-7") + + gpios.rd_shadow() if __name__ == '__main__': test_gpio() -- 2.30.2