/*
- * This file is part of the fx2lafw project.
+ * This file is part of the sigrok-firmware-fx2lafw project.
*
* Copyright (C) 2011-2012 Uwe Hermann <uwe@hermann-uwe.de>
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/*
*
* - We use the FX2 in GPIF mode to sample the data (asynchronously).
* - We use the internal 48MHz clock for GPIF.
- * - The 8 channels/pins we sample (the GPIF data bus) are PB0-PB7.
- * Support for 16 channels is not yet included, but might be added later.
- * - Endpoint 2 is used for data transfers from FX2 to host.
- * - The endpoint is quad-buffered.
+ * - The 8 channels/pins we sample (the GPIF data bus) are PB0-PB7,
+ * or PB0-PB7 + PD0-PD7 for 16-channel sampling.
+ * - Endpoint 2 (quad-buffered) is used for data transfers from FX2 to host.
*
* Documentation:
*
#include <fx2regs.h>
#include <fx2macros.h>
+#include <fx2ints.h>
#include <delay.h>
#include <setupdat.h>
#include <eputils.h>
#include <gpif.h>
-
#include <command.h>
#include <fx2lafw.h>
#include <gpif-acquisition.h>
/* ... */
-volatile bit got_sud;
+volatile __bit got_sud;
BYTE vendor_command;
+volatile WORD ledcounter = 0;
+
static void setup_endpoints(void)
{
/* Setup EP2 (IN). */
- EP2CFG = (1 << 7) | /* EP is valid/activated */
- (1 << 6) | /* EP direction: IN */
- (1 << 5) | (0 << 4) | /* EP Type: bulk */
- (0 << 3) | /* EP buffer size: 512 */
- (0 << 2) | /* Reserved. */
- (0 << 1) | (0 << 0); /* EP buffering: quad buffering */
+ EP2CFG = (1u << 7) | /* EP is valid/activated */
+ (1u << 6) | /* EP direction: IN */
+ (1u << 5) | (0u << 4) | /* EP Type: bulk */
+ (1u << 3) | /* EP buffer size: 1024 */
+ (0u << 2) | /* Reserved. */
+ (0u << 1) | (0u << 0); /* EP buffering: quad buffering */
SYNCDELAY();
/* Disable all other EPs (EP1, EP4, EP6, and EP8). */
/* EP2: Reset the FIFOs. */
/* Note: RESETFIFO() gets the EP number WITHOUT bit 7 set/cleared. */
- RESETFIFO(0x02)
+ RESETFIFO(0x02);
/* EP2: Enable AUTOIN mode. Set FIFO width to 8bits. */
EP2FIFOCFG = bmAUTOIN;
SYNCDELAY();
}
+static void send_fw_version(void)
+{
+ /* Populate the buffer. */
+ struct version_info *const vi = (struct version_info *)EP0BUF;
+ vi->major = FX2LAFW_VERSION_MAJOR;
+ vi->minor = FX2LAFW_VERSION_MINOR;
+
+ /* Send the message. */
+ EP0BCH = 0;
+ SYNCDELAY();
+ EP0BCL = sizeof(struct version_info);
+ SYNCDELAY();
+}
+
+static void send_revid_version(void)
+{
+ uint8_t *p;
+
+ /* Populate the buffer. */
+ p = (uint8_t *)EP0BUF;
+ *p = REVID;
+
+ /* Send the message. */
+ EP0BCH = 0;
+ SYNCDELAY();
+ EP0BCL = 1;
+ SYNCDELAY();
+}
+
BOOL handle_vendorcommand(BYTE cmd)
{
/* Protocol implementation */
switch (cmd) {
case CMD_START:
- /* There is data to receive - arm EP0 */
+ /* Tell hardware we are ready to receive data. */
+ vendor_command = cmd;
EP0BCL = 0;
+ SYNCDELAY();
+ return TRUE;
case CMD_GET_FW_VERSION:
- vendor_command = cmd;
+ send_fw_version();
+ return TRUE;
+ case CMD_GET_REVID_VERSION:
+ send_revid_version();
return TRUE;
- default:
- /* Unimplemented command. */
- break;
}
return FALSE;
/* We only support interface 0, alternate interface 0. */
if (ifc != 0 || alt_ifc != 0)
return FALSE;
-
+
/* Perform procedure from TRM, section 2.3.7: */
/* (1) TODO. */
/* (2) Reset data toggles of the EPs in the interface. */
/* Note: RESETTOGGLE() gets the EP number WITH bit 7 set/cleared. */
RESETTOGGLE(0x82);
-#ifdef DEBUG
- RESETTOGGLE(0x86);
-#endif
/* (3) Restore EPs to their default conditions. */
/* Note: RESETFIFO() gets the EP number WITHOUT bit 7 set/cleared. */
RESETFIFO(0x02);
/* TODO */
-#ifdef DEBUG
- RESETFIFO(0x06);
-#endif
/* (4) Clear the HSNAK bit. Not needed, fx2lib does this. */
return (cfg == 1) ? TRUE : FALSE;
}
-void sudav_isr(void) interrupt SUDAV_ISR
+void sudav_isr(void) __interrupt(SUDAV_ISR)
{
got_sud = TRUE;
CLEAR_SUDAV();
}
-void sof_isr(void) interrupt SOF_ISR using 1
+/* IN BULK NAK - the host started requesting data. */
+void ibn_isr(void) __interrupt(IBN_ISR)
{
- CLEAR_SOF();
+ /*
+ * If the IBN interrupt is not disabled, clearing
+ * does not work. See AN78446, 6.2.
+ */
+ BYTE ibnsave = IBNIE;
+ IBNIE = 0;
+ CLEAR_USBINT();
+
+ /*
+ * If the host sent the START command, start the GPIF
+ * engine. The host will repeat the BULK IN in the next
+ * microframe.
+ */
+ if ((IBNIRQ & bmEP2IBN) && (gpif_acquiring == PREPARED)) {
+ ledcounter = 1;
+ LED_OFF();
+ gpif_acquisition_start();
+ }
+
+ /* Clear IBN flags for all EPs. */
+ IBNIRQ = 0xff;
+
+ NAKIRQ = bmIBN;
+ SYNCDELAY();
+
+ IBNIE = ibnsave;
+ SYNCDELAY();
}
-void usbreset_isr(void) interrupt USBRESET_ISR
+void usbreset_isr(void) __interrupt(USBRESET_ISR)
{
handle_hispeed(FALSE);
CLEAR_USBRESET();
}
-void hispeed_isr(void) interrupt HISPEED_ISR
+void hispeed_isr(void) __interrupt(HISPEED_ISR)
{
handle_hispeed(TRUE);
CLEAR_HISPEED();
}
+void timer2_isr(void) __interrupt(TF2_ISR)
+{
+ /* Blink LED during acquisition, keep it on otherwise. */
+ if (gpif_acquiring == RUNNING) {
+ if (--ledcounter == 0) {
+ LED_TOGGLE();
+ ledcounter = 1000;
+ }
+ } else if (gpif_acquiring == STOPPED) {
+ LED_ON();
+ }
+ TF2 = 0;
+}
+
void fx2lafw_init(void)
{
/* Set DYN_OUT and ENH_PKT bits, as recommended by the TRM. */
/* TODO: Does the order of the following lines matter? */
ENABLE_SUDAV();
- ENABLE_SOF();
+ ENABLE_EP2IBN();
ENABLE_HISPEED();
ENABLE_USBRESET();
+ LED_INIT();
+ LED_ON();
+
+ /* Init timer2. */
+ RCAP2L = -500 & 0xff;
+ RCAP2H = (-500 & 0xff00) >> 8;
+ T2CON = 0;
+ ET2 = 1;
+ TR2 = 1;
+
/* Global (8051) interrupt enable. */
EA = 1;
if (vendor_command) {
switch (vendor_command) {
- case CMD_GET_FW_VERSION:
- /* TODO */
-
- /* Acknowledge the vendor command. */
- vendor_command = 0;
- break;
-
case CMD_START:
- if((EP0CS & bmEPBUSY) != 0)
+ if ((EP0CS & bmEPBUSY) != 0)
break;
- if(EP0BCL == 2) {
- gpif_acquisition_start(
- (const struct cmd_start_acquisition*)EP0BUF);
+ if (EP0BCL == sizeof(struct cmd_start_acquisition)) {
+ gpif_acquisition_prepare(
+ (const struct cmd_start_acquisition *)EP0BUF);
}
/* Acknowledge the vendor command. */
vendor_command = 0;
break;
-
default:
/* Unimplemented command. */
vendor_command = 0;
gpif_poll();
}
+
+void main(void)
+{
+ fx2lafw_init();
+ while (1)
+ fx2lafw_poll();
+}
projects / sigrok-firmware-fx2lafw.git / blobdiff