From fe9885ff7bd10dd19292bbe42879004b86b9ba08 Mon Sep 17 00:00:00 2001 From: Nicolas Schodet Date: Sat, 25 Apr 2009 13:25:15 +0200 Subject: * digital/dev2: - added real ISP. --- digital/dev2/src/common/usb_isp.c | 119 ++++++++++++++++++++++++++++++++++++++ digital/dev2/src/common/usb_isp.h | 31 ++++++++++ 2 files changed, 150 insertions(+) create mode 100644 digital/dev2/src/common/usb_isp.c create mode 100644 digital/dev2/src/common/usb_isp.h (limited to 'digital/dev2/src/common') diff --git a/digital/dev2/src/common/usb_isp.c b/digital/dev2/src/common/usb_isp.c new file mode 100644 index 00000000..8494fcab --- /dev/null +++ b/digital/dev2/src/common/usb_isp.c @@ -0,0 +1,119 @@ +/* usb_isp.c */ +/* dev2 - Multi-purpose development board using USB and Ethernet. {{{ + * + * Copyright (C) 2009 Nicolas Schodet + * + * APBTeam: + * Web: http://apbteam.org/ + * Email: team AT apbteam DOT org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * }}} */ +#include "common.h" + +#include "io.h" + +#include "usb_isp.h" +#include "descriptors.h" + +#include "modules/isp/isp.h" +#include "modules/isp/isp_frame.h" +#include "modules/isp/isp_proto.h" +#include "modules/spi/spi.h" +#include "modules/usb/usb.h" +#include "modules/utils/utils.h" + +#define RESET D, 4 +#define SCK AC_SPI0_SOFT_SCK_IO + +static uint8_t usb_isp_sent; + +void +usb_isp_send_char (uint8_t c) +{ + Endpoint_SelectEndpoint (ISP_TX_EPNUM); + /* Wait endpoint to become ready. */ + while (!Endpoint_ReadWriteAllowed ()) + ; + Endpoint_Write_Byte (c); + /* If at end of endpoint buffer, send. */ + if (!Endpoint_ReadWriteAllowed ()) + Endpoint_ClearCurrentBank (); + /* Select back RX endpoint. */ + Endpoint_SelectEndpoint (ISP_RX_EPNUM); + /* Will need extra clear at end of all transfers. */ + usb_isp_sent = 1; +} + +void +usb_isp_spi_enable (void) +{ + /* Reset slave AVR. */ + IO_DDR (RESET) |= IO_BV (RESET); + /* Set SCK to low. */ + IO_DDR (SCK) |= IO_BV (SCK); + /* Reset pulse, at least 2 clock cycle later, be conservative. */ + utils_delay_ms (1); + IO_PORT (RESET) |= IO_BV (RESET); + IO_PORT (RESET) &= ~IO_BV (RESET); + /* Enable SPI. */ + spi_init (SPI_MASTER, SPI_MODE_0, SPI_MSB_FIRST, isp_proto_sck_duration); +} + +void +usb_isp_spi_disable (void) +{ + /* Disable SPI. */ + spi_uninit (); + /* Release reset, SCK is handled by SPI driver. */ + IO_DDR (RESET) &= ~IO_BV (RESET); +} + +void +usb_isp_spi_sck_pulse (void) +{ + IO_PORT (SCK) ^= IO_BV (SCK); + IO_PORT (SCK) ^= IO_BV (SCK); +} + +uint8_t +usb_isp_spi_tx (uint8_t data) +{ + return spi_send_and_recv (data); +} + +void +usb_isp_task (void) +{ + Endpoint_SelectEndpoint (ISP_RX_EPNUM); + /* If data is available from USB: */ + if (Endpoint_ReadWriteAllowed ()) + { + /* Read as much as possible, and clear endpoint. */ + do { + isp_frame_accept_char (Endpoint_Read_Byte ()); + } while (Endpoint_ReadWriteAllowed ()); + Endpoint_ClearCurrentBank (); + } + /* If data has been sent, sent a ZLP or finalise last packet. */ + if (usb_isp_sent) + { + Endpoint_SelectEndpoint (ISP_TX_EPNUM); + Endpoint_ClearCurrentBank (); + usb_isp_sent = 0; + } +} + diff --git a/digital/dev2/src/common/usb_isp.h b/digital/dev2/src/common/usb_isp.h new file mode 100644 index 00000000..ff3840f4 --- /dev/null +++ b/digital/dev2/src/common/usb_isp.h @@ -0,0 +1,31 @@ +#ifndef usb_isp_h +#define usb_isp_h +/* usb_isp.h */ +/* dev2 - Multi-purpose development board using USB and Ethernet. {{{ + * + * Copyright (C) 2009 Nicolas Schodet + * + * APBTeam: + * Web: http://apbteam.org/ + * Email: team AT apbteam DOT org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * }}} */ + +void +usb_isp_task (void); + +#endif /* usb_isp_h */ -- cgit v1.2.3