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drivers/mcp2515: fix to add filters

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drivers/mcp2515: enable filtering

The current driver implementation initializes the driver in a way to receive all the CAN messages without matching the filters. This commit changes that by adding a macro definition that will be enabling or disabling the filtering and accordingly set the appropriate mcp2515 acceptance mode
This commit is contained in:
Firas Hamdi 2022-05-05 17:32:17 +02:00 committed by Benjamin Valentin
parent 7b827f405c
commit 3f9866e709
4 changed files with 21 additions and 6 deletions
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10
drivers/mcp2515/candev_mcp2515.c
View File

@ -421,7 +421,6 @@ static int _get(candev_t *candev, canopt_t opt, void *value, size_t max_len)
static int _set_filter(candev_t *dev, const struct can_filter *filter)
{
DEBUG("inside _set_filter of MCP2515\n");
bool filter_added = true;
struct can_filter f = *filter;
int res = -1;
enum mcp2515_mode mode;
@ -453,7 +452,7 @@ static int _set_filter(candev_t *dev, const struct can_filter *filter)
/* Browse on each mailbox to find an empty space */
int mailbox_index = 0;
while (mailbox_index < MCP2515_RX_MAILBOXES && !filter_added) {
while (mailbox_index < MCP2515_RX_MAILBOXES) {
/* mask unused */
if (dev_mcp->masks[mailbox_index] == 0) {
/* set mask */
@ -467,7 +466,7 @@ static int _set_filter(candev_t *dev, const struct can_filter *filter)
dev_mcp->filter_ids[mailbox_index][0] = f.can_id;
/* function succeeded */
filter_added = true;
break;
}
/* mask existed and same mask */
@ -498,7 +497,7 @@ static int _set_filter(candev_t *dev, const struct can_filter *filter)
dev_mcp->filter_ids[mailbox_index][filter_pos] = f.can_id;
/* function succeeded */
filter_added = true;
break;
}
}
mailbox_index++;
@ -513,7 +512,8 @@ static int _set_filter(candev_t *dev, const struct can_filter *filter)
return -1;
}
return filter_added;
/* Filter added */
return 0;
}
static int _remove_filter(candev_t *dev, const struct can_filter *filter)

10
drivers/mcp2515/mcp2515.c
View File

@ -108,7 +108,15 @@ int mcp2515_init(candev_mcp2515_t *dev, void (*irq_handler_cb)(void *))
return -1;
}
uint8_t cmd = MCP2515_RXB0CTRL_MODE_RECV_ALL;
uint8_t cmd;
if (IS_ACTIVE(MCP2515_RECV_FILTER_EN)) {
DEBUG_PUTS("filtering enabled");
cmd = MCP2515_RXB0CTRL_MODE_RECV_FILTER;
}
else {
DEBUG_PUTS("filtering disabled");
cmd = MCP2515_RXB0CTRL_MODE_RECV_ALL;
}
res = mcp2515_spi_write(dev, MCP2515_RXB0CTRL, &cmd, 1);
if (res < 0) {

5
drivers/mcp2515/mcp2515.h
View File

@ -71,6 +71,11 @@ enum mcp2515_error {
/** Wake up source */
#define MCP2515_WKUP_SRC_INTERNAL 1
/** Acceptance mode (enable/disable filtering) */
#ifndef MCP2515_RECV_FILTER_EN
#define MCP2515_RECV_FILTER_EN 0
#endif
/**
* @brief Initialize pins and SPI interface
*

2
drivers/mcp2515/mcp2515_defines.h
View File

@ -300,6 +300,7 @@ extern "C" {
#define MCP2515_RXB0CTRL_BUKT1 0x02
#define MCP2515_RXB0CTRL_BUKT 0x04
#define MCP2515_RXB0CTRL_RXRTR 0x08
#define MCP2515_RXB0CTRL_MODE_RECV_FILTER 0x00
#define MCP2515_RXB0CTRL_RXM0 0x20
#define MCP2515_RXB0CTRL_RXM1 0x40
#define MCP2515_RXB0CTRL_MODE_RECV_STD_OR_EXT 0x00
@ -312,6 +313,7 @@ extern "C" {
#define MCP2515_RXB1CTRL_FILHIT1 0x02
#define MCP2515_RXB1CTRL_FILHIT2 0x04
#define MCP2515_RXB1CTRL_RXRTR 0x08
#define MCP2515_RXB1CTRL_MODE_RECV_FILTER 0x00
#define MCP2515_RXB1CTRL_RXM0 0x20
#define MCP2515_RXB1CTRL_RXM1 0x40
#define MCP2515_RXB1CTRL_MODE_RECV_STD_OR_EXT 0x00