From 31d7194252cdde340fa874c258e257312cb3ba8f Mon Sep 17 00:00:00 2001 From: Dean Camera Date: Wed, 23 Dec 2009 14:45:47 +0000 Subject: Make seperate ISP, PDI and TPI folders in the AVRISP project Lib subdirectory to hold each protocol's files. --- Projects/AVRISP/Lib/PDITarget.c | 335 ---------------------------------------- 1 file changed, 335 deletions(-) delete mode 100644 Projects/AVRISP/Lib/PDITarget.c (limited to 'Projects/AVRISP/Lib/PDITarget.c') diff --git a/Projects/AVRISP/Lib/PDITarget.c b/Projects/AVRISP/Lib/PDITarget.c deleted file mode 100644 index 2c6ffd9a6..000000000 --- a/Projects/AVRISP/Lib/PDITarget.c +++ /dev/null @@ -1,335 +0,0 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2009. - - dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com -*/ - -/* - Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, and distribute this software - and its documentation for any purpose and without fee is hereby - granted, provided that the above copyright notice appear in all - copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaim all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -/** \file - * - * Target-related functions for the PDI Protocol decoder. - */ - -#define INCLUDE_FROM_PDITARGET_C -#include "PDITarget.h" - -#if defined(ENABLE_PDI_PROTOCOL) || defined(__DOXYGEN__) - -/** Flag to indicate if the USART is currently in Tx or Rx mode. */ -volatile bool IsSending; - -#if !defined(PDI_VIA_HARDWARE_USART) -/** Software USART raw frame bits for transmission/reception. */ -volatile uint16_t SoftUSART_Data; - -/** Bits remaining to be sent or received via the software USART - set as a GPIOR for speed. */ -#define SoftUSART_BitCount GPIOR2 - - -/** ISR to manage the software USART when bit-banged USART mode is selected. */ -ISR(TIMER1_COMPA_vect, ISR_BLOCK) -{ - /* Toggle CLOCK pin in a single cycle (see AVR datasheet) */ - BITBANG_PDICLOCK_PIN |= BITBANG_PDICLOCK_MASK; - - /* If not sending or receiving, just exit */ - if (!(SoftUSART_BitCount)) - return; - - /* Check to see if we are at a rising or falling edge of the clock */ - if (BITBANG_PDICLOCK_PORT & BITBANG_PDICLOCK_MASK) - { - /* If at rising clock edge and we are in send mode, abort */ - if (IsSending) - return; - - /* Wait for the start bit when receiving */ - if ((SoftUSART_BitCount == BITS_IN_PDI_FRAME) && (BITBANG_PDIDATA_PIN & BITBANG_PDIDATA_MASK)) - return; - - /* Shift in the bit one less than the frame size in position, so that the start bit will eventually - * be discarded leaving the data to be byte-aligned for quick access */ - if (BITBANG_PDIDATA_PIN & BITBANG_PDIDATA_MASK) - SoftUSART_Data |= (1 << (BITS_IN_PDI_FRAME - 1)); - - SoftUSART_Data >>= 1; - SoftUSART_BitCount--; - } - else - { - /* If at falling clock edge and we are in receive mode, abort */ - if (!IsSending) - return; - - /* Set the data line to the next bit value */ - if (SoftUSART_Data & 0x01) - BITBANG_PDIDATA_PORT |= BITBANG_PDIDATA_MASK; - else - BITBANG_PDIDATA_PORT &= ~BITBANG_PDIDATA_MASK; - - SoftUSART_Data >>= 1; - SoftUSART_BitCount--; - } -} -#endif - -/** Enables the target's PDI interface, holding the target in reset until PDI mode is exited. */ -void PDITarget_EnableTargetPDI(void) -{ -#if defined(PDI_VIA_HARDWARE_USART) - /* Set Tx and XCK as outputs, Rx as input */ - DDRD |= (1 << 5) | (1 << 3); - DDRD &= ~(1 << 2); - - /* Set DATA line high for at least 90ns to disable /RESET functionality */ - PORTD |= (1 << 3); - asm volatile ("NOP"::); - asm volatile ("NOP"::); - - /* Set up the synchronous USART for XMEGA communications - - 8 data bits, even parity, 2 stop bits */ - UBRR1 = (F_CPU / 1000000UL); - UCSR1B = (1 << TXEN1); - UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1); - - /* Send two BREAKs of 12 bits each to enable PDI interface (need at least 16 idle bits) */ - PDITarget_SendBreak(); - PDITarget_SendBreak(); -#else - /* Set DATA and CLOCK lines to outputs */ - BITBANG_PDIDATA_DDR |= BITBANG_PDIDATA_MASK; - BITBANG_PDICLOCK_DDR |= BITBANG_PDICLOCK_MASK; - - /* Set DATA line high for at least 90ns to disable /RESET functionality */ - BITBANG_PDIDATA_PORT |= BITBANG_PDIDATA_MASK; - asm volatile ("NOP"::); - asm volatile ("NOP"::); - - /* Fire timer compare ISR every 100 cycles to manage the software USART */ - OCR1A = 80; - TCCR1B = (1 << WGM12) | (1 << CS10); - TIMSK1 = (1 << OCIE1A); - - /* Send two BREAKs of 12 bits each to enable TPI interface (need at least 16 idle bits) */ - PDITarget_SendBreak(); - PDITarget_SendBreak(); -#endif -} - -/** Disables the target's PDI interface, exits programming mode and starts the target's application. */ -void PDITarget_DisableTargetPDI(void) -{ -#if defined(PDI_VIA_HARDWARE_USART) - /* Turn off receiver and transmitter of the USART, clear settings */ - UCSR1A |= (1 << TXC1) | (1 << RXC1); - UCSR1B = 0; - UCSR1C = 0; - - /* Set all USART lines as input, tristate */ - DDRD &= ~((1 << 5) | (1 << 3)); - PORTD &= ~((1 << 5) | (1 << 3) | (1 << 2)); -#else - /* Set DATA and CLOCK lines to inputs */ - BITBANG_PDIDATA_DDR &= ~BITBANG_PDIDATA_MASK; - BITBANG_PDICLOCK_DDR &= ~BITBANG_PDICLOCK_MASK; - - /* Tristate DATA and CLOCK lines */ - BITBANG_PDIDATA_PORT &= ~BITBANG_PDIDATA_MASK; - BITBANG_PDICLOCK_PORT &= ~BITBANG_PDICLOCK_MASK; -#endif -} - -/** Sends a byte via the USART. - * - * \param[in] Byte Byte to send through the USART - */ -void PDITarget_SendByte(const uint8_t Byte) -{ -#if defined(PDI_VIA_HARDWARE_USART) - /* Switch to Tx mode if currently in Rx mode */ - if (!(IsSending)) - { - PORTD |= (1 << 3); - DDRD |= (1 << 3); - - UCSR1B |= (1 << TXEN1); - UCSR1B &= ~(1 << RXEN1); - - IsSending = true; - } - - /* Wait until there is space in the hardware Tx buffer before writing */ - while (!(UCSR1A & (1 << UDRE1))); - UCSR1A |= (1 << TXC1); - UDR1 = Byte; -#else - /* Switch to Tx mode if currently in Rx mode */ - if (!(IsSending)) - { - BITBANG_PDIDATA_PORT |= BITBANG_PDIDATA_MASK; - BITBANG_PDIDATA_DDR |= BITBANG_PDIDATA_MASK; - - IsSending = true; - } - - /* Calculate the new USART frame data here while while we wait for a previous byte (if any) to finish sending */ - uint16_t NewUSARTData = ((1 << 11) | (1 << 10) | (0 << 9) | ((uint16_t)Byte << 1) | (0 << 0)); - - /* Compute Even parity - while a bit is still set, chop off lowest bit and toggle parity bit */ - uint8_t ParityData = Byte; - while (ParityData) - { - NewUSARTData ^= (1 << 9); - ParityData &= (ParityData - 1); - } - - /* Wait until transmitter is idle before writing new data */ - while (SoftUSART_BitCount); - - /* Data shifted out LSB first, START DATA PARITY STOP STOP */ - SoftUSART_Data = NewUSARTData; - SoftUSART_BitCount = BITS_IN_PDI_FRAME; -#endif -} - -/** Receives a byte via the software USART, blocking until data is received. - * - * \return Received byte from the USART - */ -uint8_t PDITarget_ReceiveByte(void) -{ -#if defined(PDI_VIA_HARDWARE_USART) - /* Switch to Rx mode if currently in Tx mode */ - if (IsSending) - { - while (!(UCSR1A & (1 << TXC1))); - UCSR1A |= (1 << TXC1); - - UCSR1B &= ~(1 << TXEN1); - UCSR1B |= (1 << RXEN1); - - DDRD &= ~(1 << 3); - PORTD &= ~(1 << 3); - - IsSending = false; - } - - /* Wait until a byte has been received before reading */ - while (!(UCSR1A & (1 << RXC1))); - return UDR1; -#else - /* Switch to Rx mode if currently in Tx mode */ - if (IsSending) - { - while (SoftUSART_BitCount); - - BITBANG_PDIDATA_DDR &= ~BITBANG_PDIDATA_MASK; - BITBANG_PDIDATA_PORT &= ~BITBANG_PDIDATA_MASK; - - IsSending = false; - } - - /* Wait until a byte has been received before reading */ - SoftUSART_BitCount = BITS_IN_PDI_FRAME; - while (SoftUSART_BitCount); - - /* Throw away the parity and stop bits to leave only the data (start bit is already discarded) */ - return (uint8_t)SoftUSART_Data; -#endif -} - -/** Sends a BREAK via the USART to the attached target, consisting of a full frame of idle bits. */ -void PDITarget_SendBreak(void) -{ -#if defined(PDI_VIA_HARDWARE_USART) - /* Switch to Tx mode if currently in Rx mode */ - if (!(IsSending)) - { - PORTD |= (1 << 3); - DDRD |= (1 << 3); - - UCSR1B &= ~(1 << RXEN1); - UCSR1B |= (1 << TXEN1); - - IsSending = true; - } - - /* Need to do nothing for a full frame to send a BREAK */ - for (uint8_t i = 0; i < BITS_IN_PDI_FRAME; i++) - { - /* Wait for a full cycle of the clock */ - while (PIND & (1 << 5)); - while (!(PIND & (1 << 5))); - } -#else - /* Switch to Tx mode if currently in Rx mode */ - if (!(IsSending)) - { - BITBANG_PDIDATA_PORT |= BITBANG_PDIDATA_MASK; - BITBANG_PDIDATA_DDR |= BITBANG_PDIDATA_MASK; - - IsSending = true; - } - - while (SoftUSART_BitCount); - - /* Need to do nothing for a full frame to send a BREAK */ - SoftUSART_Data = 0x0FFF; - SoftUSART_BitCount = BITS_IN_PDI_FRAME; -#endif -} - -/** Busy-waits while the NVM controller is busy performing a NVM operation, such as a FLASH page read or CRC - * calculation. - * - * \return Boolean true if the NVM controller became ready within the timeout period, false otherwise - */ -bool PDITarget_WaitWhileNVMBusBusy(void) -{ - TCNT0 = 0; - TIFR0 = (1 << OCF1A); - - uint8_t TimeoutMS = PDI_NVM_TIMEOUT_MS; - - /* Poll the STATUS register to check to see if NVM access has been enabled */ - while (TimeoutMS) - { - /* Send the LDCS command to read the PDI STATUS register to see the NVM bus is active */ - PDITarget_SendByte(PDI_CMD_LDCS | PDI_STATUS_REG); - if (PDITarget_ReceiveByte() & PDI_STATUS_NVM) - return true; - - if (TIFR0 & (1 << OCF1A)) - { - TIFR0 = (1 << OCF1A); - TimeoutMS--; - } - } - - return false; -} - -#endif -- cgit v1.2.3